If I owned a martial arts studio and I let a student do that, I’d face criminal & civil liability. Why shouldn’t trained officers of the law be held to at least that standard?
Part of the outrage is how blatantly unequal the treatment of cops and and civilians accused of crimes are. It’s especially galling because not only are they given the power of the state, they are also given extra rigorous training in the safe application of force. If anyone should have reasonably known that kneeling on someone’s neck would be lethal, it would be the cops.
Oh, and all the bystanders who clearly recognized what was going on. Apparently they’re more wise to the dangers of kneeling on a restrained human’s neck than the police are.
I do believe they should be arrested for accessory and face a trial by jury. It’s your right to think to the contrary, but your rationalizations about why they were willing to stand by and watch something that has deeply shocked the conscious of the whole nation is both disturbing and unconvincing.