So you “know” there was violence before the police started shooting?
All of the witnesses, bikers, and cops agree some fight happened (in the bathroom and/or parking lot or both). Dozens of bikers were sent to the hospital with stab wounds ect that obviously were not inflicted by the police.
So yes, I would say a fight between the bikers is pretty much a fact.
But I would like to see all video taken to know for sure the sequence of events.