It’s not obvious to me that warehousing someone for life is massively less barbaric than the death penalty. Either way, you’re depriving them of a full life; one just takes a lot longer.
Some people, through their actions, have demonstrated that they’re unable to live freely in society. Society has to choose what to do with those people. There isn’t any great answer, only shades or different types of suckage.
"For life" means maximum of 20 years in Germany. There is also preventive detention afterwards for people that are insane or would still be a danger to society etc.
So there is a big difference between death penalty and 20 years. Also you can at least somehow correct the punishment if you "got the wrong guy".
Some people, through their actions, have demonstrated that they’re unable to live freely in society. Society has to choose what to do with those people. There isn’t any great answer, only shades or different types of suckage.