Violence is not preferable, but it’s the appropriate response at times.
In this case, it’s very understandable the guy reacted the way he did. Not preferable, but understandable. He was being harassed, and had stated that the person needed to stop. They didn’t. They actively pursued him. He also was approached from behind by someone else involved. He made an accurate non-lethal shot with a lethal weapon. Good on him. Maybe now he’ll carry some pepper spray, too, so he has more options.