Your post is based on the implication that Floyd was killed by the cops.
Yet it might very much be that all the cop did was hold Floyd down to the floor without occluding his airway or any blood vessels and it was the large dose of opiate that Floyd (might have) consumed that caused the respiratory depression or apnea.
Whatever did or did not happen, its for sure the optics are not good and Floyd did not ‘deserve’ to die. Yet, the question really is if he was killed by the cops or by the opiates in his system. Would the outcome be any different if he would have been seated in the back seat without any force. Fentanyl is pretty fast acting, if he just consumed a rather large dose of fenatnyl, he might have arrested in the back seat of the police vehicle.
Unless one gets a kick out of looting and rioting, any rush to judgement is bad and might one day come back to bite someone else.