Every cell in your body wants to find the guy and beat him until he doesn't have an intact bone. Brutality has its appeal. It really does. You have to turn off, not get involved. Americans are insulated from death.
Cops see a lot of it.
It isn't pretty movie-death. It's the grandmother who stroked out in the bathtub three days ago, and the flies beat you to her. It's the teenage Cambodian gang-shot in the head, still breathing, with brain tissue swelling out of the hole like obscene lips. DOA in progress. You turn off.