You must remember most people in prisons who are extremely violent need psychological therapy but unfortunately are just thrown in a cage. You could be the toughest motherfucker around and they still would attack you. They don't fear anyone and actually love receiving pain along with giving it.

If you were to hit them as hard as you could they would actually enjoy it. You could smash their face in and they would literally start laughing in your face no matter how bad you hurt them. They are sick and are not programmed as a normal person.

This is why they are locked up.