When God created Adam from dust.. Or clay whichever view to take. Adam was meant to represent the perfect human.. Made in Gods image to commune with God, take in mind any being in order to commune with God has to be by nature sinless as any sin is an anathema to a Holy God. However, Adam fell into sin.. The Bible and Quran both attest to this fact. Once sin was introduced to mankind through Adams disobedience then it was no longer possible for mankind to fulfil the role set out.. That being communion with a Holy God. You believe that God simply forgave Adam and he went forth to populate the earth. Here we see the consequence of sin differently. Christians believe that sin cannot be viewed so lightly and every sin carries a penalty which must be paid. God can't just arbitrarily forgive a sin without a penalty being paid. Adams penalty was to be banished to live out a life of toil for an allotted time which would end in death. We can never do enough by our own actions to pay this penalty because we need God to pay on our behalf, because only a Holy God can make us sinless and only by becoming sinless can we by Gods grace achieve paradise and community with God.

Jesus was the solution, Jesus is the last Adam.. Because Jesus is what Adam was meant to be a sinless being, and as such was the means we can achieve righteousness and stand before a Holy God. As Adams sin sold us into the bondage of a sinful nature Jesus gave us the gift of spiritual eternal life through His selfless sacrifice. Without Jesus we are dead in our sins.

Adam was created with no parents because he was the first being and until Eve was given in companionship human reproduction was not decreed. Once they were banished to earthly life and told to populate the earth.. Then we have human reproduction and from then all humans are born this way. Jesus, Gods Word, had to be born through a woman... Which makes Jesus fully Human.. Yet as Gods Word is essence of God then that Word is sinless as God is sinless.. Both the Bible and Quran claim Jesus as Gods Word and also attest to His sinless nature. God caused Mary to become pregnant with Jesus. Again both the Quran and Bible attest to this fact. God determined some of the physical characteristics of Jesus. All of the genetic characteristics of Jesus were determined by just two parties: God and Mary. On this basis I do not see where muslims have a problem with the nature of Christ, unless it is your belief that all this can only come about by a physical act between God and Mary.. (May God forgive my words, and may He see I mean no blasphemy by them) as it's been said many times this is only found in the Quran and no where in the Bible or Jewish scriptures has it ever been implied that any physical act was necessary. So no Christians or Jews (goes without saying) would ever have held such a point of view.. Indeed if they had it would have been contrary to their scriptures.
So, other than Jesus ... The last Adam..correcting the error of the the first Adam, who allowed a sinful nature to enter into mankind separating us from our Holy God.. When we die we die for eternity. By Jesus's sacrifice on the cross (through Gods will) the we are granted the chance of eternal life. The creation of Adam and Jesus have nothing in common other than they were both ordained by God.

I can give you a selection of biblical verses that point to the reasons for the birth and the nature of The Christ but I don't see the point. I have probably wasted enough time as it is :) so there it is.. My explanation of my belief as I see it.. I do not expect you to understand it or for sure see the truth of it... However your lack of understanding or open minded ness does not in any way detract from my belief as truth. As my belief is mine and yours is yours and on this point we are free to agree to disagree with respect and cordiality.

I wish you peace and may God bless you. Xx