2. Jesus is not God.
There are some ambiguous parts of the New Testament which are interpreted by Trinitarians to mean that Jesus is God:When we examine the Bible holistically, we find that the attributes and personality of Jesus and God are so juxtaposed that they cannot be the same God. This is because Jesus lacks many of the attributes of God such as Omniscience and Omnipotence.
The common way that Trinitarians attempt to resolve this paradox is to say that when God took on flesh in the form of Jesus on earth, He had a human nature alongside a divine nature. So the person of Jesus had two natures such that he was both fully man and fully God at the same time. Therefore in becoming man, God was subject to the limitations of human beings because of the human nature of Jesus. Once Jesus was crucified, resurrected and ascended back to God, he took on a new glorified, spiritual body. Now that he has taken up his place on the throne at the right hand of God, he is free of all the limitations he had when he was here on earth.
Now there is a real problem with this explanation. The Bible explicitly states that God Almighty has an eternal and unchanging nature:So as you can see, this explanation creates more problems than it attempts to solve. You can’t have an eternal and unchanging God on the one hand, and a ‘person’ of Him, Jesus according to Christians, that is changing. If Jesus took on a dual nature, that is, a limited human nature alongside his divine nature, whilst at the same time still being God, then the implication is that in becoming man, the nature of God changed. When Jesus then ascended and took on a glorified, spiritual body, whilst still being God, then the nature of God changed once again. This conflicts with the knowledge from the Bible that God is eternal and unchanging. Here is a diagram which summarises the Christian claims and why they are a problem (click on picture to enlarge):

The Qur’an resolves these paradoxes and theological problems by portraying Jesus in the correct light:So, the reality is that Jesus is a Messenger of God, not divine, just like the other messengers sent by God before and after him.
You can learn more about why Jesus can’t be God here.
You can learn more about Jesus in Islam here.

3. Jesus was not crucified.

All the writers of the New Testament unanimously state that Jesus was crucified. The Qur’an claims the exact opposite, Jesus was not crucified but rather God saved him from this grisly fate:The Qur’an states that those who believe that Jesus was crucified “differ about it” and are “in doubt”. In other words, the claims of the New Testament about these events surrounding Jesus are not reliable. It would be truly remarkable if the Qur’an’s claims about the reliability of the New Testament were proved to be correct, when not only is the Qur’an in direct opposition to multiple eyewitnesses of the Crucifixion (as the New Testament claims), but the Qur’an was also revealed much later than the New Testament.
Since the Crucifixion and Resurrection are the bedrock of the Christian faith, one would expect the information presented about these events in the New Testament to be in perfect harmony. When one analyses the various New Testament accounts of the Crucifixion and Resurrection of Jesus, we find that they are filled with irreconcilable contradictions and inconsistencies. One very famous issue is known as the “Mary Magdalene Problem”, details of which can be found here.
If the writers of the New Testament can’t even get the details of this significant event right, then it casts doubt on their credibility as inspired writers, and therefore the reliability of the New Testament as a whole. Why should anything that they recorded about Jesus be accepted as a reliable account? Mankind should rely on the Qur’an as an accurate and reliable source of information about the life and teachings of Jesus, peace be upon him, because the Qur’an is free of contradictions.

4. Defending the honour and integrity of the Prophets.

The Old Testament paints a very noble and honourable concept of Prophethood:Unfortunately the Old Testament presents the Prophets in an extremely negative light when it narrates their stories. No sin is too great for them to commit, nor is any vice beyond their lowly desires. Just one example is the allegation that David committed adultery and murder:This is a real problem, as it goes against the very nature and purpose of Prophethood as defined in the Bible itself.
The Qur’an defines the concept of Prophethood in very noble and honourable terms. Unlike the Bible, the Qur’an presents the Prophets in such a way that satisfies this ideal. For example, regarding David:In the Qur’an there is no conflict between the purpose of Prophethood and the Prophets themselves, as they are said to be the best of mankind.
You can read more about a comparison of Prophethood in the Qur’an and Bible here.

5. Joseph’s unfulfilled dream.

Prophet Joseph had a dream about his family prostrating to him:It’s important to note that the moon in his dream represents his mother Rachel. The problem is that before Joseph’s dream is fulfilled, his mother passes away:His brothers do eventually prostrate to him near the end of his story:Notice that Rachel is not alive to prostrate to him. The dreams of God’s Prophets represent visions of the future that will come true. So this is a prophecy of God that is unfulfilled in the Bible.
In the Qur’an, there is no such issue as his mother is alive to bow and fulfil the dream:

6. The ruler of Egypt – King or Pharaoh?
The Bible uses the term “Pharaoh” to refer to the ruler of Egypt in the stories of Moses, Joseph and Abraham:Advances in our knowledge of ancient Egyptian hieroglyphs have revealed that the word ‘Pharaoh’ is a title that originates from the Egyptian term ‘per-aa’, literally “great house”, describing the royal palace. Historically, however, “Pharaoh” only started being used as a title for the king much later in Egyptian history, during the New Kingdom period:

This means that the Bible gets it wrong historically, it is an anachronism to use the word “Pharaoh” as a title in reference to the Egyptian ruler in the stories of Joseph and Abraham, as the word only took on this meaning much later in history, at the time of Moses.
The Qur’an refers to the sovereign ruler of ancient Egypt throughout its chapters:
– With regard to the Egyptian ruler who was a contemporary of Joseph, the Qur’an uses the title “King”; he is never once labelled as Pharaoh.
– As for the Egyptian ruler during the time of Moses, the Qur’an repeatedly calls him “Pharaoh” and never calls him “King”.
So, the Qur’an’s usage of “Pharaoh” respects what we know historically about the changing meaning of the word. Amazingly, these historical facts were unknown at the time of the Qur’anic Revelation in the 7th century, as our knowledge of Egyptian hieroglyphs had long been lost. Knowledge of the old Egyptian hieroglyphs had been totally forgotten until they were finally deciphered in the 19th century CE with the discovery of the Rosetta Stone, over 1,000 years after the revelation of the Qur’an.
You can learn more about hieroglyphs and the historicity of the Qur’an here.

7. The moon does not emit its own light.

The Bible describes the light of the sun and moon in the following verse:What’s interesting is that the same Hebrew word, ‘ma’owr’, which means “light, luminary”, is used to describe the light of both the sun and moon. If this is interpreted literally then it is scientifically inaccurate, as it would indicate that the sun and the moon are similar when it comes to light. The reality is that the sun emits its own light whereas the moon reflects light from the sun, like a mirror. This is exactly how the Qur’an describes the sun and moon:

8. Corruption of the Torah.
The verses above show that the Qur’an speaks of the original revelation given to Moses, peace be upon him, in an extremely positive light. The original Torah is described as being “guidance”, “light” and a “mercy”, just as all divinely inspired Scriptures are. The Qur’an also confirms that the Israelites, who were entrusted with safeguarding the Torah, were responsible for corrupting it:This verse of the Qur’an would have sounded like a conspiracy theory to most Jews and Christians living in the 7th century. Today there is a remarkable convergence of what the Qur’an says about the Torah and what modern scholarship says. Today we see this Qur’anic verse with its historical insight vindicated by the Dead Sea scrolls and other manuscript discoveries. Today various Biblical scholars are affirming that people wrote it with their own hands and attributed it to Moses and thus to God.
Readers are invited to learn more about the corruption of the Torah here.
It is only the Qur’an, God Almighty’s last and final revelation to mankind, that has been perfectly preserved. God has promised mankind that He will protect and preserve the Qur’an:Readers are invited to learn more about the miraculous preservation of the Qur’an here.

9. An impossible Exodus.

The Bible makes a claim about the number of Israelites that escaped Egypt with Moses (known as the “Exodus”):The Bible also states that the Israelites were important to the Egyptians because as slaves they were the workforce of Egypt:This would mean that at the Exodus, ancient Egypt suffered a catastrophic loss of most, if not all, of its labour workforce. According to the Bible there were 600,000 Israelite men that came out of Egypt. If you factor in women and children that figure would be closer to a few million. The problem is that there is absolutely no evidence of this historical event. There are no ancient Egyptian records of the sudden disappearance of millions of their people. There is also no physical evidence of settlements out in the desert where all these people and livestock encamped. From a purely practical point of view, how did Moses wake up and mobilise millions people in the middle of the night without being detected by the Egyptians?
The Qur’an’s account of this event is far more historically accurate and realistic as it says that it was actually only a small group of Israelites that escaped from Egypt:This is in line with what modern historians say, if there was an exodus then it couldn’t have happened on the massive scale that the Bible claims.

10. Dealing in usury.

The Bible describes the practice of dealing in usury as one of the worst sins:Jews are forbidden from charging interest when lending money to other Jews:How is it, then, that usury is permitted with non-Jews (referred to as “foreigners”):Surely a sin is a sin, regardless of who is sinned against? By comparison the Qur’an comprehensively condemns the practice of usury:Notice how the Qur’an not only declares unlawful all acts of usury going forward, it also commanded believers to give up what was owed to them in interest from past loans, with only the original sum of the loan being lawful and not a penny more. The Qur’an also criticises the Jews for practising usury when it had been forbidden for them in the original Torah, this seems to indicate that the verses which permit usury against non-Jews in the Torah have been falsified:What should be fresh in our minds is the recent turmoil in the financial markets which was caused by unscrupulous practices such as dealing in usury.

CONCLUSION
Any claims that the author of the Qur’an copied and plagiarised the Bible are completely without substance. When one copies they do so blindly, one does not copy and then make corrections and improvements. As we have seen, many of the corrections found in the Qur’an could not have been known by any human author as they required knowledge of the unseen. Were the Qur’an the product of a human mind, or tampered with by human hands, then it too would be filled with mistakes just like the Bible. From where, then, did the Qur’an originate? The Qur’an answers: