You ever shot at something outside of a video game? Especially with an old semi-auto assault rifle? While it's running away from you? It's hardly a decided matter--try skeet shooting sometime.

Are you afraid of cars? Of lathes or mills? One misstep with those and you're going to lose a digit, more likely than not.

Weapons are tools, and you can't go through life being afraid of tools. You respect them, you treat them carefully, but you shouldn't be afraid of them.

Why is the idea of someone else being able to kill people at will so distressing to you? It shouldn't be an issue, right, if you haven't put yourself in a position to deserve it--after all, that's the position you're wishing on those who would go against the military or police.