Christians normally claim that Islam does not make Any sense because why would God leave human kind for thousands of years then all of the sudden send a prophet Muhammad peace be upon him with a new message and a book in Arabic
In fact, Islam is the most logical and comprehensive religion. A fair, and balanced research would lead any unbiased person to come to this conclusion. Islam is the most logical, natural and fulfilling way of life but since the claim is from Christians mostly, for the purpose of this article I will try to explain logically why Islam is more logical than Christianity.
God is one the creator of the universe, God in Arabic is Allah. Arab Christians also call God (Allah).
“The One God exists in Three Persons and One Substance." God the father, God the son, and God the Holy Spirit., and those three are one, and equal.
Although Christians say they are equal, you will never hear them say it in any other order except father – son – Holy Spirit. If they are equal can they say Holy Spirit – son – father?
According to the doctrine of the Trinity, the Father and Son are co-equal. If that is true, how can the Father be (in any way) greater than Jesus? “I am going to the Father, for the Father is greater than I.”
Is it clear who is God from the book?
It is crystal clear who is God in Islam, one God, the creators, and no partners to associate with him in worship. The Quran goes in length about Allah, and his attributes, and his 99 names, for example The Master of the Universe," as stated in Verses 22-23, Chapter 26 of the Holy Quran, The Beneficent, The Merciful, “There is nothing like unto Him, and He is The Hearer, The Seer “ (Al-Shoura, 42: 11), and the many attributes of Allah.
It is not clear from the bible about the trinity, there is no single verse in the whole bible about the 3 gods in one. The only verses in the whole Bible that explicitly ties God, Jesus, and the Holy Spirit in one "Triune" being is the verse of 1 John 5:7, it has been taken out of most English translations bible because "The text about the three heavenly witnesses (I John 5:7 KJV) is not an authentic part of the New Testament." [The Interpreter's Dictionary of the Bible, Vol. 4, p.711, Abingdon Press.]”
If that concept was so important, why is it not in the bible (the guidance for followers)? Leave it for interpretation based on people’s wishes and desires? If you give the bible to someone who never heard of trinity, and ask them to extract this out, they will not. It is like giving someone a title of a book, how to learn French in 10 days, you read the whole books, and it has nothing to do with French, the same could be said about the trinity and the bible.
Who to worship?
It is very clear from the Quran who to worship. Many verses in the Quran ,Allah tell us to worship him, for example “Say: He is Allah, (the) One; (1)Allah, the Eternal; (2)He did not beget (give birth) and He was not begotten (given birth to); (3)And there has never been anyone equal to Him. (4) (112: 1- 4). “And I (Allah) created not the jinn and mankind except that they should worship Me (Alone).” [Az-Zariyat 51:56]
“And your Lord has decreed that you worship none but Him…” [Al-Isra’ 17:23]
“Say (O Muhammad P.B.U.H): “Come, I will recite what your Lord has prohibited you from: Join not anything in worship with Him….” [Al-An’am 6:151]
Every Muslim in His Five Prayers confirms this Belief:
“You (Alone) we worship, and You (Alone) we ask for help (for each and everything)” [Al-Fatihah 1:5]
Again it is not clear, there is no single verse of Jesus sayings in the bible, which explicitly state to worship him, or that he is one of three God/s. in fact the bible states that Jesus peace be upon him was praying to someone “ God, my God, why have you forsaken me"? (cf. Mark 15:34; Matthew 27:46) Was he praying to himself? If so, was he complaining to himself about why he had forsaken himself?
“One of those days Jesus went out to a mountainside to pray, and spent the night praying to God” Luke 6:12 who was he praying to? To himself?
The messengers/ prophets.
God created Adam, and then thought our father how to repent, after he disobeyed God, and thought him who our enemy was. Adam peace be upon him was a messenger to his children, and he was the first messenger on Earth, the message was the same, worship one God, and do not associate any partners with him and follow the messenger. Humans are not sinless but messengers are protected from major sins but not from minor sins .
Allah has established proof against His servants by sending the Messengers and sending down the Books. They were not sent to one nation to the exclusion of others. Rather they were sent to all nations, in different places and at different times, as Allah say
“Verily! We have sent you with the truth, a bearer of glad tidings, and a warner. And there never was a nation but a warner had passed among them.” [Faatir 3524]
Muslims have to believe in all the prophets and messengers of God, equally, without distinction. In the Holy Quran (2:136, 285, and 3:84 etc.) it is stated clearly: "We make no distinction between them".
“Indeed, We sent Nuh (Noah) to his people and he said: “O my people! Worship Allah! You have no other Ilah (God) but Him. Certainly, I fear for you the torment of a Great Day!” [Al-A’raf 7: 59]
The Quran mentions the names of 25 prophets and indicates there were others. It says:
“Of some messengers We have already told you the story; of others We have not; - and to Moses God spoke direct.” (Quran 4:164)
The Names of the 25 Prophets Mentioned are as follows:
Yahya (John the Baptist)
So Muhammad peace be upon him did not come with a new message, it was the same teaching of all the messengers before him including Ibrahim, Jesus, and Moses peace be upon them all. The message stayed the same, worship one God without any partners.
You would expect that major events such as the crucifixion and the resurrection of Christ, that make up the entire case for Christianity, to be at least prophesied by the prophets/ messengers in the old testament, without any ambiguity, and without any deliberate mistranslations and lies. The Truth and the sad reality for the believers in the crucifixion, "trinity", doesn't even exist in the entire Bible.
So what were the messengers teaching before the coming of “son of God”?
The same massage of Islam “.. None has the right to be worshipped but God, the One and the Only True God…” (Quran 3:62)
“Thou shalt have no other gods before me “Exodus 20:3 = Deuteronomy 5:7
Even Jesus peace be upon him said the same [And one of the scribes came, and … asked him, Which is the first commandment of all? And Jesus answered him, The first of all the commandments is, Hear, O Israel; The Lord our God is one Lord:] (Mark 12:28-29, KJV)
[Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfill.] (Matthew 5:17)
In fact according to the bible the prophets prayed the way Muslims pray
"And he (Jesus) went a little farther, and fell on his face, and prayed (Matthew 26:39)
"And Moses made haste, and bowed his head toward the earth, and worshipped." (Exodus 34:8)
And Joshua fell on his face to the earth, and did worship (Joshua 5:14)
Islam is the religion, which was given to Adam peace be upon him the first man and the first prophet of Allah, and it was the religion of all the prophets, may Allah exalt their mention, sent by Allah to humankind. Islam means the complete submission and obedience to Allah (God). Therefore, all prophets were indeed MUSLIMS because they were true submitters to the will of ALLAH, the Creator. Prophet Muhammad peace upon him was the seal of prophets, he was sent to present Allah's revelation in its final form and for the last time. This was necessary because the message delivered by the previous Prophets and Messengers, peace upon them all, had been corrupted or distorted by their followers. Allah took it upon Himself to guard the last message (i.e. the Quran) from corruption. He says in the Quran :"Verily, it is We Who have sent down the message (i. e., the Quran) and surely, We will be its guardian.” [Quran 15:9]
In contrast the trinity in Christianity does not make any sense, “The One God exists in Three Persons and One Substance." God the father, God the son, and God the Holy Spirit., and those three are one, and equal. Do the scriptures show Jesus and his Father to be co-equal? Jesus himself answers at John 14:28, "The Father is greater than I am." Non of the prophets taught trinity. The whole religion is based on the dying son who will die for our sins but he does not even mention it! so God sacrificed himself to himself so human kind can go back to heaven as the sin of Adam made us unholy. God does not want to forgive the sin of Adam, instead he sends his son ( that is him too) to be humiliated, spat on, and killed on the cross, and that the only way to forgive human kind!! It makes perfect sense !