All that will do is make the pile of bodies higher. The solutions are attainable and don’t involve violence.
I think you could argue that the cause of violence is the massive imbalance in power between the people involved. Ideally the risk of actual consequence might dissuade police from acting thoughtlessly.
Edit: specifically referring to the violence at protests, not broader violence issues. It’s worth remembering that Americans have a first amendment right to protest peacefully.
Look at what happens anywhere there is a police vacuum. Be it Somalia, Mexico, Paris Suburbs, South African townships.