Because the teacher is inside the school with the children, their own life is at risk, and maybe they have some affection for those kids too. The Deputy was outside where his own life was not at risk, so the situation is quite different. If a killer was coming for me and my charges, I’d want the option of shooting back.
I work in IT, Community volunteer interested in Politics, support Capitalism as the best economic system for lifting people out of poverty, Skeptical scientist.