There are predatory people around, and if we don’t kill them, they will kill, rape, rob and do anything else to us that they feel like. I know. I’ve dealt with them. There IS no education or reform package that works on them short of death. The recidivism rate for sociopaths after death is given is 0%.
The counter arguments include that there are sociopaths who are socially functional and don’t break the law any more than the population at large. And putting predators in prison reduces their predatory scope even doesn’t “reform” them.
That said when said predators are in the act of a violent crime using lethal force to defend against them, even if it results in the death of the predator, is a praiseworthy act. And a good argument can be made such an outcome is preferable to the predator going through the legal system.—Joe]