First of all he was just doing his job. I think what he did, he had done it often, and nobody ever died before. Re your “he put a target on all cops and that’s what he did ”
I blame the Media and the black lives matter group, and the person that filmed it and caused all the destruction. You can also blame the idiot that called the cops because Floyd passed a fake $20 bill, is what started it all.
And when a cop is in attack mode, its hard to call him off, make him stop, like an attack dog that is let loose on a bad guy, not easy to stop the attack.