The Koran tells us about this and condemns this:
5.32 On that account: We ordained for the Children of Israel that if any one slew a person - unless it be for murder or for spreading mischief in the land - it would be as if he slew the whole people: and if any one saved a life, it would be as if he saved the life of the whole people. Then although there came to them Our apostles with clear signs, yet, even after that, many of them continued to commit excesses in the land
"According to the Talmud, Jesus was executed by a proper rabbinical court for idolatry, inciting other Jews to idolatry, and contempt of rabbinical authority. All classical Jewish sources which mention his execution are quite happy to take responsibility for it; in the talmudic account the Romans are not even mentioned.
"The more popular accounts--which were nevertheless taken quite seriously--such as the notorious Toldot Yeshu are even worse, for in addition to the above crimes they accuse him of witchcraft. The very name 'Jesus' was for Jews a symbol of all that is abominable and this popular tradition still persists...
The koran tells us:
4.157. That they said (in boast), "We killed Christ Jesus the son of Mary, the Messenger of God.;- 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:-
The Talmud then say:
Rosh Hashanah 17a. Christians (minnim) and others who reject the Talmud will go to hell and be punished there for all generations.
Sanhedrin 90a. Those who read the New Testament ("uncanonical books") will have no portion in the world to come.
Shabbath 116a. Jews must destroy the books of the Christians, i.e. the New Testament.
The koran responds by:
And they say: "None shall enter Paradise unless he be a Jew or a Christian." Those are their (vain) desires. Say: "Produce your proof if ye are truthful."Nay,-whoever submits His whole self to God and is a doer of good,- He will get his reward with his Lord; on such shall be no fear, nor shall they grieve. The Jews say: "The Christians have naught (to stand) upon; and the Christians say: "The Jews have naught (To stand) upon." Yet they study the (same) Book. Like unto their word is what those say who know not; but God will judge between them in their quarrel on the Day of Judgment. 2.111-113
Truth About the Talmud: Judaism's Holiest Book
As for the Gospel
Jesus is reported to have said “he that hath seen me hath seen the Father” and “I am in the Father, and the Father in me” (John 14:9-10); but in the same passage he shortly goes on to add: “At that day ye shall know that I am in my Father, and ye in me, and I in you.” (John 14:20) Again, while Jesus does proclaim “I and my Father are one” (John 10:30), he also prays for his followers, “that they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us.” (John 17:21) Whatever the nature of the “oneness” Jesus is claiming exists between God and himself, it is apparently something that is supposed to hold between God and all Christians – in which case it can hardly be the relation of numerical identity.
Likewise, in the two New Testament passages where Jesus is said to have regarded himself as “equal with God” – John 5:18 and Philippians 2:6 – the Greek word translated “equal” is isos, which means “on the same level” or “of the same rank,” never “identical.” The claim that Jesus was God did not become Christian orthodoxy until the Council of Nicaea in 325 CE. The orthodox reading of these passages seems natural today only because they are read through the lens of what “everybody knows” about Jesus’ claims to divinity; few would find incarnationism in the texts unless they first brought it there.
An objector may point to the opening lines of the Gospel of John, which apparently identify the “Logos” with God (John 1:1) and the “Logos made flesh” with Jesus (John 1:14). Of course these lines were not spoken by Jesus, and so do not show that Jesus himself claimed to be God; but in any case, what exactly are they saying? The relation between God and the Logos seems to fall short of strict identity; the Greek, literally translated, says something like “the Logos was with the God, and God is what the Logos was” – an awkward construction clearly trying to express a subtler relation than identity. The term “Logos” is borrowed from Greek philosophy, where it means a thing’s abstract rational nature; the Logos that is “with” God and is what God is, is not God but God’s nature. To say that Jesus is the Logos made flesh, then, is simply to say that he is a physical embodiment of God’s nature. This hardly makes him identical with God, since all human beings are supposed to be created from God’s spirit (Genesis 2:7) and in God’s image and likeness (Genesis 1:26-27).
Indeed the New Testament authors clearly understand Jesus as offering everyone the opportunity to be sons (and daughters) of God and to partake of God’s nature:
“But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name: Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.” (John 1:12-13)
“For as many as are led by the Spirit of God, they are the sons of God. ... And if children, then heirs; heirs of God, and joint-heirs with Christ.” (Romans 8:14-17)
“Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him.” (1 John 3:2)
As the New Testament authors understand Jesus’ message, being the “Son of God” is evidently not a status that Jesus claims for himself alone, but one that is open to all Christians;
In a Blog's Stead - February 2004
Clearly this has no basis in the Gospel, the Koran reiterates this:
People of the Book, do not go beyond the bounds in your religion, and say nought as to God but the Truth. The messiah, Jesus, son of Mary, was only the messenger of God, and his word that he committed to Mary, and a spirit originating from Him. So believe in God and His Messengers, and say not 'Three'. Refrain, better is for you. God is only one God. Glory be to him-that He should have a son! To Him belongs all that is in the Heavens and in the Earth; God suffices for a guardian. (4.171)
"And they say, The All-Merciful has taken unto Himself a son. You have indeed advanced something hideous. As if the skies are about to burst, the earth to split asunder and its mountain to fall down in the utter ruin for that they have attributed to the All-merciful a son; and behaves not the All-merciful to take a son. None there in the heavens and earth but comes to the All-Merciful as a servant" (Maryam 19:88-93)
There is nothing, absolutely nothing about corruption or tampering of previous scriptures. The Koran states that the Talmud is NOT the word of God and orders the Jews and everybody else to follow Torah and says the Christian priests are NOT following the Gospel but indeed they hide and conceal and take things out of context and following vain desires:
"They (i.e. Jews and Christians) changed words from their contexts and forgot a good part of the message given to them, and you will continue to find them -except a few among them- bent on new deceits…" (5:13)
There is among them a section who distort the Book with their tongues: (as they read) you would think it is a part of the Book, but it is no part of the Book; and they say, 'That is from God,' but it is not from God: It is they who tell a lie against God and (well) they know it! (3,78)
Then is it only a part of the Book that ye believe in, and do ye reject the rest? But what is the reward for those among you who behave like this but disgrace in this life? - And on the Day of Judgment they shall be consigned to the most grievous penalty. For God is not unmindful of what ye do. ( 2,85)
So the Koran does not differentiate between the scriptures but the followers are not following them.