Quranist rise and end of Sunni/Shia sect

Sorry, this is not entirely correct. There is a reference to some of the Jews or Christians(most likely Jews) who aided them:

And He brought those of the People of the Scripture who supported them down from their strongholds, and cast panic into their hearts. Some ye slew, and ye made captive some. 33.26

And it seems it was these the Quran was talking:

9.28. O ye who believe! Truly the Pagans are unclean; so let them not, after this year of theirs, approach the Sacred Mosque. And if ye fear poverty, soon will Allah enrich you, if He wills, out of His bounty, for Allah is All-knowing, All-wise. 9.29. Fight those who believe not in Allah nor the Last Day, nor hold that forbidden which hath been forbidden by Allah and His Messenger, nor acknowledge the religion of Truth of the People of the Book, until they pay the Jizya with willing submission, and feel themselves subdued

Once again this shows that Jizya is for war reperations.

My bad!