I'm just wondering where the rationale for that comes from. Not disagreeing with the sentiment that he is a sick individual.
What authority do we as a nation possess to end the life of another human?
I can't really come up with a viable answer for that, and I think it's a deep subject. I also don't understand the fascination with all sorts of gruesome forms of death as a means of "settling the score" and appeasing the populace for what someone did.