The Koran advises the believers on the subject of infidels in their neighborhoods and circles of friends.

IX/123:
O ye who believe! Fight those of the disbelievers who are near to you, and let them find harshness in you, and know that Allah is with those who keep their duty (unto Him).

IV/144:
O ye who believe! Choose not disbelievers for (your) friends in place of believers. Would you give Allah a clear warrant against you?

V/51:
O ye who believe! Take not the Jews and Christians for friends. They are friends one to another. He among you who taketh them for friends is (one) of them. Lo! Allah guideth not wrongdoing folk.

III/118:
O ye who believe! Take not for intimates others than your own folk, who would spare no pains to ruin you; they love to hamper you. Hatred is revealed by (the utterance of) their mouths, but that which their breasts hide is greater. We have made plain for you the revelations if ye will understand.

IX/122:
And the believers should not all go out to fight. Of every troop of them, a party only should go forth, that they (who are left behind) may gain sound knowledge in religion, and that they may warn their folk when they return to them, so that they may beware.

IV/160-161:
Because of the wrongdoing of the Jews We forbade them good things which were (before) made lawful unto them, and because of their much hindering from Allah's way,
And of their taking usury when they were forbidden it and of their devouring people's wealth by false pretenses. We have prepared for those of them who disbelieve a painful doom.

VI/147:
Unto those who are Jews We forbade every animal with claws. And of the oxen and the sheep forbade We unto them the fat thereof save that upon the backs or the entrails, or that which is mixed with the bone. That We awarded them for their rebellion. And lo! We verily are Truthful.

V/57:
O ye who believe! Choose not for friends such of those who received the Scripture before you, and of the disbelievers, as make a jest and sport of your religion. But keep your duty to Allah if ye are true believers.

IV/101:
And when ye go forth in the land, it is no sin for you to curtail (your) worship if ye fear that those who disbelieve may attack you. In truth the disbelievers are an open enemy to you.

IV/102:
And when thou (O Muhammad) art among them and arranges" (their) worship for them, let only a party of them stand with thee (to worship) and let them take their arms. Then when they have performed their prostrations let them fall to the rear and let another party come that bath not worshipped and let them worship with thee, and let them take their precaution and their arms. Those who disbelieve long for you to neglect your arms and your baggage that they may attack you once for all. It is no sin for you to lay aside your arms, if rain impedeth you or ye are sick. But take your precaution. Lo! Allah prepareth for the disbelievers shameful punishment.