The Koran (5:51) says not to take a Jew as a friend. There are more like this…
Surah Al-'Imran (The Family of Imran)
Ayah [118]
O you who believe! Take not as (your) Bitanah (advisors, consultants, protectors, helpers, friends, etc.) those outside your religion (pagans, Jews, Christians, and hypocrites) since they will not fail to do their best to corrupt you. They desire to harm you severely. Hatred has already appeared from their mouths, but what their breasts conceal is far worse. Indeed We have made plain to you the Ayat (proofs, evidences, verses) if you understand.
Surah Al-Ma’idah
Ayah [5]
Made lawful to you this day are AtTayyibat [all kinds of Halal (lawful) foods, which Allah has made lawful (meat of slaughtered eatable animals, etc., milk products, fats, vegetables and fruits, etc.). The food (slaughtered cattle, eatable animals, etc.) of the people of the Scripture (Jews and Christians) is lawful to you and yours is lawful to them. (Lawful to you in marriage) are chaste women from the believers and chaste women from those who were given the Scripture (Jews and Christians) before your time, when you have given their due Mahr (bridal money given by the husband to his wife at the time of marriage), desiring chastity (i.e. taking them in legal wedlock) not committing illegal sexual intercourse, nor taking them as girl-friends. And whosoever disbelieves in the Oneness of Allah and in all the other Articles of Faith [i.e. His (Allah’s), Angels, His Holy Books, His Messengers, the Day of Resurrection and AlQadar (Divine Preordainments)], then fruitless is his work, and in the Hereafter he will be among the losers.
Surah Al-Ma’idah (The (Dinner) Table)
Ayah [51]
O you who believe! Take not the Jews and the Christians as Auliya’ (friends, protectors, helpers, etc.), they are but Auliya’ to one another. And if any amongst you takes them as Auliya’, then surely he is one of them. Verily, Allah guides not those people who are the Zalimun (polytheists and wrongdoers and unjust).
Surah Al-Mujadilah (She Who Pleaded)
Ayah [14]
Have you (O Muhammad ) not seen those (hypocrites) who take for friends a people upon whom is the Wrath of Allah (i.e. Jews)? They are neither of you (Muslims) nor of them (Jews), and they swear to a lie while they know.
Surah Al-Mumtahinah (The Examined One)
Ayah [13]
O you who believe! Take not as friends the people who incurred the Wrath of Allah (i.e. the Jews). Surely, they have been in despair to receive any good in the Hereafter, just as the disbelievers have been in despair about those (buried) in graves (that they will not be resurrected on the Day of Resurrection).
Thus these modern advice sites
It is not permissible for a Muslim man or woman to take a male or female friend who is not a Muslim, because Allaah has forbidden us to love the kuffaar or take them as close friends and companions
islamqa.com/index.php?ref=69876&ln=eng
Question :
In the Quraan, it says that we can not take the Kuffaar as awliyaa, but what does that mean? I mean, to what degree? Can we do business with them still? If I’m at school, can we play basketball with them? Can we talk to them about basketball and stuff? Can we hang out with them as long as they keep their beliefs to themselves? The reason I ask is because someone I know does hang out with them in this way and it doesn’t affect his beliefs, but I still tell him, “Why don’t you hang out with the muslims instead?” He says that most or many of the Muslims drink and take drugs where they hang out and they have girlfriends and he’s afraid that the sins of the Muslims will lure him, yet he’s sure that the Kufr of the Kaafirs will not lure him because that’s something that isn’t attractive to him. So is hanging out with them, playing sports with them, and talking with them about sports considered as “taking them as awliyaa instead of the believers” keeping in mind that he is doing that for his own eemaan?.
Answer :
Praise be to Allaah.
Firstly:
Allaah has forbidden the believers to take the kaafireen (disbelievers) as friends, and He has issued a stern warning against doing that.
islamqa.com/index.php?ref=59879&ln=eng
Thus the terms ‘friend’ and ‘neighbour’ whilst they appear in Islam, don’t hold the same meaning. It was for this reason, too, that I reject your salutation of ‘peace’ because in Islam peace means that I, as a non-Moslem must submit to Islam.