The Family Of Imran - 3:63 If they turn away, surely Allah knows the corrupters.
How did the Christians turn away from the truth that Jesus (pbuh) was the servant of Allah?
Prophet Jonah/10:15 "When Our clear Verses are recited to them, those who do not hope to meet Us say: "Bring another Qur´an other than this, or change it!"Say: "I cannot change it from my own side. I follow only what has been revealed to me. If I disobey my Lord, I fear the punishment of a great Day."

The Ornaments of Gold/43:57 When the son of Mary was shown as an example, your people immediately rejected.
The Ornaments of Gold/43:58 "They said: "Are our gods better or is he?"They said this only to argue with you. They are indeed a quarrelsome people."

The Cow/2:120 "Neither the Jews nor the Christians will be pleased with you unless you enter into their religion. Say: "The right way is the way of Allah."If you follow their desires after the knowledge that has come to you, you will find neither a friend nor a supporter to defend you against Allah."