Just about everybody I talk to says it is a shame nobody in there had a gun to shoot the bastard with.

There will always be a gun for a determined asshole to shoot somebody with even if they have to make it themselves.

Look at the bombers. You can't buy a bomb anywhere I know of. Bombs are illegal as far as I know. The bombers make them. Ask Bernardine Dohrn and Bill Ayers. They are experienced.