(All) people are a single nation; so Allah raised prophets as bearers of good news and as warners, and He revealed with them the Book with truth, that it might judge between people in that in which they differed; and none but the very people who were given it differed about it after clear arguments had come to them, revolting among themselves; so Allah has guided by His will those who believe to the truth about which they differed and Allah guides whom He pleases to the right path.

And We have revealed to you the Book with the truth, verifying what is before it of the Book and a guardian over it, therefore judge between them by what Allah has revealed, and do not follow their low desires (to turn away) from the truth that has come to you; for every one of you did We appoint a law and a way, and if Allah had pleased He would have made you (all) a single people, but that He might try you in what He gave you, therefore strive with one another to hasten to virtuous deeds; to Allah is your return, of all (of you), so He will let you know that in which you differed;

And if Allah please He would certainly make you a single nation, but He causes to err whom He pleases and guides whom He pleases; and most certainly you will be questioned as to what you did.

Indeed, there is for you a good example in Ibrahim and those with him when they said to their people: Surely we are clear of you and of what you serve besides Allah; we declare ourselves to be clear of you, and enmity and hatred have appeared between us and you forever until you believe in Allah alone-- but not in what Ibrahim said to his father: I would certainly ask forgiveness for you, and I do not control for you aught from Allah-- Our Lord! on Thee do we rely, and to Thee do we turn, and to Thee is the eventual coming: