Reich,
so remember, whatever you say, the followers of Usman won at that time.** it is quite possible that their version of history has remained. there are a few traditions that put the authenticity of the Quran in doubt. but again,** we rubbish them aside as "weak ahadiths". that term in itself looks synonymous to "conspiracy theory" in religious parlance.
no on the contrary most of mainstream scholars are sympatheic to the cause of Ali vs his opponents
so ummayyads might have won the political victory but in history & hadith they are definately seen as the ones backing the wrong side
you cannot say that all hadith grading is a big hoax or coverup ...it is much more complicated than that
if that was the case muslim scholars wud have erased all records of early intra-muslim warfare