Sure, or they're crocodile tears If that keeps him from punishing more people, then I'm alright with that.
I do, but I have no evidence it will work on him. My world's rules don't apply everywhere.
There are lots of people from worlds where killing is glorified, who have been through experiences where they've had to fight for their lives. And people who are forced to be used to it sometimes also have trouble with a normal, violence-free life after that experience. That's not always the same thing as "glorifying killing".