Even that violence is better when minimized right?

You don't want police to apply excessive force. You won't want innocent bystanders to be shot by the police. You don't want the police to hurt people just because they think they may be guilty, etc. Those things do happen and when they happen people get upset and rightfully so.

Violence is only necessary when people refuse to abide by the rules. If nobody was violent, cops wouldn't need to be. If people adhered to the system and went to jail whem convicted, there would be no problems. Violence begets violence. It is possible to craft a society where we leave it in our past.