What the Koran says about christianity:
[2.62] Surely those who believe, and those who are Jews, and the Christians, and the Sabians, whoever believes in Allah and the Last day and does good, they shall have their reward from their Lord, and there is no fear for them, nor shall they grieve.
[2.111] And they say: None shall enter the garden (or paradise) except he who is a Jew or a Christian. These are their vain desires. Say: Bring your proof if you are truthful.
[2.113] And the Jews say: The Christians do not follow anything (good) and the Christians say: The Jews do not follow anything (good) while they recite the (same) Book. Even thus say those who have no knowledge, like to what they say; so Allah shall judge between them on the day of resurrection in what they differ.
[2.120] And the Jews will not be pleased with you, nor the Christians until you follow their religion. Say: Surely Allah's guidance, that is the (true) guidance. And if you follow their desires after the knowledge that has come to you, you shall have no guardian from Allah, nor any helper.
[2.135] And they say: Be Jews or Christians, you will be on the right course. Say: Nay! (we follow) the religion of Ibrahim, the Hanif, and he was not one of the polytheists.
[2.140] Nay! do you say that Ibrahim and Ismail and Yaqoub and the tribes were Jews or Christians? Say: Are you better knowing or Allah? And who is more unjust than he who conceals a testimony that he has from Allah? And Allah is not at all heedless of what you do.
The Family of Imran
[3.67] Ibrahim was not a Jew nor a Christian but he was (an) upright (man), a Muslim, and he was not one of the polytheists.
The Dinner Table
[5.14] And with those who say, We are Christians, We made a covenant, but they neglected a portion of what they were reminded of, therefore We excited among them enmity and hatred to the day of resurrection; and Allah will inform them of what they did.
[5.18] And the Jews and the Christians say: We are the sons of Allah and His beloved ones. Say: Why does He then chastise you for your faults? Nay, you are mortals from among those whom He has created, He forgives whom He pleases and chastises whom He pleases; and Allah's is the kingdom of the heavens and the earth and what is between them, and to Him is the eventual coming.
[5.51] O you who believe! do not take the Jews and the Christians for friends; they are friends of each other; and whoever amongst you takes them for a friend, then surely he is one of them; surely Allah does not guide the unjust people.
[5.69] Surely those who believe and those who are Jews and the Sabians and the Christians whoever believes in Allah and the last day and does good-- they shall have no fear nor shall they grieve.
[5.82] Certainly you will find the most violent of people in enmity for those who believe (to be) the Jews and those who are polytheists, and you will certainly find the nearest in friendship to those who believe (to be) those who say: We are Christians; this is because there are priests and monks among them and because they do not behave proudly.
[9.30] And the Jews say: Uzair is the son of Allah; and the Christians say: The Messiah is the son of Allah; these are the words of their mouths; they imitate the saying of those who disbelieved before; may Allah destroy them; how they are turned away!
[22.17] Surely those who believe and those who are Jews and the Sabeans and the Christians and the Magians and those who associate (others with Allah)-- surely Allah will decide between them on the day of resurrection; surely Allah is a witness over all things.