This is a leaked video from Blackwater in Iraq. It's some horrifying shit - they're just driving into town running over people and shooting random people for fun. Obviously the content is shocking, so careful if you're not ready to watch this. Also, imagine the shit they did that wasn't filmed/leaked.
Like I said in my other comment capital punishment should essentially only be used in the case of war crimes. I do believe people can be rehabilitated in 99% of cases.
War crimes are the exception not the rule.
So stick them in a less comfortable holding facility with the understanding that they may not be rehabilitated.
If its truly punishment you're after a life of reflection will truly be worse than death. And if they're true sociopaths - fine, they won't care either way. Better to let them rot than to be killed and sow the seeds of future fascist mythologisation.
A weak old person is anathema to reactionary martyrdom, imo.
Would you do that for the SS? Go ahead and sit there and tell me from your high horse that you wouldn't give members of the SS the death penalty.
guess the Jewish partisans that rose up and killed Nazi occupiers after the Axis lost shoulda just put em in a holding cell