The Qur'anic verses 21:91 and 66:12 in conjunction with the tafsir's, tell us the Angel Jibreel (جبريل Gabriel) was sent to breathe Allah's spirit into Maryam's (Mary's) vagina in order to conceive Jesus.
[وَمَرْيَمَ ابْنَةَ عِمْرَانَ الَّتِى أَحْصَنَتْ فَرْجَهَا
(And Maryam, the daughter of `Imran who guarded her chastity (private part).) meaning, who protected and purified her honor, by being chaste and free of immorality,
[فَنَفَخْنَا فِيهِ مِن رُّوحِنَا]
(And We breathed into it (private part) through Our Ruh,) meaning, through the angel Jibril. Allah sent the angel Jibril to Maryam, and he came to her in the shape of a man in every respect. Allah commanded him to blow into a gap of her garment and that breath went into her womb through her private part; this is how `Isa was conceived.
Jesus' role in Islam is nothing more than window dressing, originally meant to ease the process of protelysation among followers of Christianity. This is still being used by Islamic missionaries and apologists today.
Christ the son of Mary was no more than a messenger; many were the messengers that passed away before him. His mother was a woman of truth. They had both to eat their (daily) food. See how Allah doth make His signs clear to them; yet see in what ways they are deluded away from the truth!
Who was Given the Injil
The Qur'an talks of the Injil (إنجيل) referring to the New Testament of the Bible (usually the four Gospels), which was given to Jesus, rather than being written by his followers.
And We sent after them in their footsteps Isa, son of Marium, verifying what was before him of the Taurat and We gave him the Injeel in which was guidance and light, and verifying what was before it of Taurat and a guidance and an admonition for those who guard (against evil).
Islam's portrayal of the crucifixion of Jesus differs vastly from the mainstream Christian view and borders almost on the Gnostic. According to Islamic theology, Jesus was never crucified. It was merely a deception by Allah who made it appear that he was.
The reader should be aware of the dates of authorship for the following writings. The canonical Christian scriptures were authored during the 1st century A.D. The Coptic Apocalypse of Peter and the Second Treatise of the Great Seth were authored during the 3rd century A.D. The Quran was revealed between 610-632 AD; its initial compilation was in 633 AD; and a "revisionary committee" preserved one standard sometime between 644-656 AD.
That they rejected Faith; that they uttered against Mary a grave false charge; That they said (in boast), "We killed Christ Jesus the son of Mary, the Messenger of Allah";- but they killed him not, nor crucified him, but so it was made to appear to them
, and those who differ therein are full of doubts, with no (certain) knowledge, but only conjecture to follow, for of a surety they killed him not:- Nay, Allah raised him up unto Himself
; and Allah is Exalted in Power, Wise;- And there is none of the People of the Book but must believe in him before his death; and on the Day of Judgment he will be a witness against them;-
The Savior said to me, "He whom you see above the cross, glad and laughing, is the living Jesus. But he into whose hands and feet they are driving the nails is his physical part, which is the substitute. They are putting to shame that which is in his likeness. But look at him and me."
But I, when I had looked, said, "Lord, no one is looking at you. Let us flee this place." But he said to me, "I have told you, 'Leave the blind alone!' And notice how they do not know what they are saying. For the son of their glory, instead of my servant, they have put to shame."
And I saw someone about to approach us who looked like him, even him who was laughing about the cross, and he was <filled> with a pure spirit, and he (was) the Savior...And he said to me, "Be strong! For you are the one to whom these mysteries have been given, to know through revelation that he whom they have crucified is first-born, and the home of demons, and the clay vessel in which they dwell...But he who stands near him is the living Savior...
"And I was in the mouths of lions. And (as for) the counsel which they planned about me against destruction of their deception and their foolishness, I did not give in to them as they had devised. And I was not afflicted at all. Those there punished me, yet I did no die in solid reality but in what appears.....For my death which they think happened, (happened) to them in their error and blindness. They nailed their man up to their death. For their minds did not see me, for they were deaf and blind. But in doing these things, they render judgment against themselves...For when I came down no one saw me. For I kept changing my forms above, transforming from appearance to appearance.
Canonical Christian Scriptures
Acts of the Apostles
He is said to be coming back as a Muslim and will break the cross (destroy Christianity), kill swine (This may be a reference to the destruction of the Jews, as the Qur'an says Jews were once turned into apes and pigs ), and be a slave to Islam. He will also abolish the jizyah, which will leave Jews and Christians with only two options. To convert to Islam or die. Verse 9:29 calls for the extortion of Jew and Christians.
Fight those who believe not in Allah or the Last Day, nor hold that forbidden which hath been forbidden by Allah and His Messenger, nor acknowledge the religion of Truth, (even if they are) of the People of the Book, until they pay the jizya with willing submission, and feel themselves subdued
When (Jesus) the son of Mary is held up as an example, behold, thy people raise a clamour threat (in ridicule)! And they say, "Are our gods best, or he?" This they set forth to thee, only by way of disputation: yea, they are a contentious people. He was no more than a servant: We granted Our favour to him, and We made him an example to the Children of Israel. And if it were Our Will, We could make angels from amongst you, succeeding each other on the earth. And (Jesus) shall be a Sign (for the coming of) the Hour (of Judgment)
: therefore have no doubt about the (Hour), but follow ye Me: this is a Straight Way. Let not the Evil One hinder you: for he is to you an enemy avowed. When Jesus came with Clear Signs, he said: "Now have I come to you with Wisdom, and in order to make clear to you some of the (points) on which ye dispute: therefore fear Allah and obey me. "For Allah, He is my Lord and your Lord: so worship ye Him: this is a Straight Way."
Muslims believe that Jesus will come back to fight for Islam, not Christianity.
The Prophet (peace be upon him) said: There is no prophet between me and him, that is, Jesus (peace be upon him). He will descent (to the earth). When you see him, recognise him: a man of medium height, reddish fair, wearing two light yellow garments, looking as if drops were falling down from his head though it will not be wet. He will fight the people for the cause of Islam. He will break the cross, kill swine, and abolish jizyah. Allah will perish all religions except Islam
. He will destroy the Antichrist and will live on the earth for forty years and then he will die. The Muslims will pray over him.
Narrated Abu Huraira:
Allah’s Apostle said, “By Him in Whose Hands my soul is, surely (Jesus,) the son of Mary will soon descend amongst you and will judge mankind justly (as a Just Ruler); he will break the Cross and kill the pigs and there will be no Jizya (i.e. taxation taken from non Muslims). Money will be in abundance so that nobody will accept it, and a single prostration to Allah (in prayer) will be better than the whole world and whatever is in it.” Abu Huraira added “If you wish, you can recite (this verse of the Holy Book): — ‘And there is none Of the people of the Scriptures (Jews and Christians) But must believe in him (i.e Jesus as an Apostle of Allah and a human being) Before his death. And on the Day of Judgment He will be a witness Against them
.” (4.159) (See Fateh Al Bari, Page 302 Vol 7)
Then when judgment day arrives Jesus will judge the people by the words of the Qur'an and not of the Bible.
Narrated Abu Huraira:
Allah’s Apostle said “How will you be when the son of Mary (i.e. Jesus) descends amongst you and he will judge people by the Law of the Quran and not by the law of Gospel (Fateh-ul Bari page 304 and 305 Vol 7)
While Muslims will claim they "love Jesus", it is clearly evident that they do not love Yasū‘ (يسوع the actual Arabic term for Jesus), but love the Islamic Isa who's life, when studied, shares little in common with the founder of Christianity.