How about I interst them in some Oil Barons who are responsible for the degredation of the arctic habitat? they are slightly less toxic

Both of these are unnecessarily cruel. We are above such things. If isolation from society and reeducation are not enough and he must be permanently removed from society, the execution method should be swift and humane.

Imagine caring about the feelings of fascists

They get put somewhere they can't hurt anyone and that's all that matters