When studying the psychology of criminals in prisons for extreme violent crimes what really surprised me was that, from the beginning until the end, most of them had an internal justification sort-of belief system about why they were actually the good guys and their violent and often brutal repeated acts were just to punish those they saw as the actual bad guys even indirectly (like sexually assaulting a person was just to punish all those "bad" people that never let them live peacefully their sexuality)