There is a difference between not jumping into a burning building and not shooting someone running away from you. Once they’re fleeing, shooting them is not self-defense just because you’re afraid they might come back in the future.
If you don’t believe that, when does it stop being self-defense? Maybe they’ll come back a decade from now, then surely it’s self-defense to break into their home and kill them in their sleep to protect yourself.
There is a difference between not jumping into a burning building and not shooting someone running away from you. Once they’re fleeing, shooting them is not self-defense just because you’re afraid they might come back in the future.
If you don’t believe that, when does it stop being self-defense? Maybe they’ll come back a decade from now, then surely it’s self-defense to break into their home and kill them in their sleep to protect yourself.