And it weren't for the other armed protection everyone would have been dead. No one died except the shooter. I guarantee there is more good people than bad.
I have no interest in debating gun control but I do have a question.
Let's say you're at the mall. You hear shots. You look around the corner because you're a good armed citizen and you see 2 guys shooting at each other, one a mad gunman one a good armed citizen.
Who do you shoot?
I don't think it's as simple as you imply.