This isn’t just “someone annoying him”, the harasser is a 6’5" dude who walked up to within inches of the shooter, then when the shooter told him to get back and started backing away himself, continued to close the distance. This is open and shut self defense, you don’t get to hunt someone down like that, staying in their personal space, and expect them to not feel threatened. YOU would feel threatened and if you’re telling me otherwise, I have a friend named Billy Bob who’d like to stand silently in your personal space for the remainder of the year.