The Qur'an:
Qur'an (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."
Qur'an (5:80) - "You will see many of them befriending those who disbelieve; certainly evil is that which their souls have sent before for them, that Allah became displeased with them and in chastisement shall they abide." Those Muslims who befriend unbelievers will abide in hell.
Qur'an (3:28) - "Let not the believers Take for friends or helpers Unbelievers rather than believers: if any do that, in nothing will there be help from Allah..."
Qur'an (3:118) - "O you who believe! do not take for intimate friends from among others than your own people, they do not fall short of inflicting loss upon you; they love what distresses you; vehement hatred has already appeared from out of their mouths, and what their breasts conceal is greater still; indeed, We have made the communications clear to you, if you will understand." This verse not only warns Muslims not to take non-Muslims as friends, but it establishes the deep-seated paranoia that the rest of the world is out to get them.
Qur'an (9:23) - "O ye who believe! Choose not your fathers nor your brethren for friends if they take pleasure in disbelief rather than faith. Whoso of you taketh them for friends, such are wrong-doers" Even family members are not to be taken as friends if they do not accept Islam. (This is the mildest interpretation of this verse from the 9th Sura, which also advocates "slaying the unbeliever wherever ye find them").
Qur'an (53:29) - "Therefore shun those who turn away from Our Message and desire nothing but the life of this world."
Qur'an (3:85) - "And whoever desires a religion other than Islam, it shall not be accepted from him, and in the hereafter he shall be one of the losers."
Qur'an (3:10) - "(As for) those who disbelieve, surely neither their wealth nor their children shall avail them in the least against Allah, and these it is who are the fuel of the fire." Those who do not believe in Muhammad are but fuel for the fire of Hell (also 66:6, 2:24. 21:98).
Qur'an (7:44) - "The Companions of the Garden will call out to the Companions of the Fire: "We have indeed found the promises of our Lord to us true: Have you also found Your Lord's promises true?" They shall say, "Yes"; but a crier shall proclaim between them: "The curse of Allah is on the wrong-doers" Muslims in heaven will amuse themselves by looking down on non-Muslims in Hell and mocking them while they are being tortured (see 22:19-22.
Qur'an (1:5-7) - "Show us the straight path, The path of those whom Thou hast favoured; Not the (path) of those who earn Thine anger nor of those who go astray" This is a prayer that Muslims are supposed to repeat each day. "Those who earn Thine anger" specifically refers to Jews and "those who go astray" refers to Christians (see Bukhari (12:749)).