Except that those guys rarely, if ever, randomly shoot up a school. It's the ones who look normal when walking down the street but harbor deep, dark fantasies of revenge and mayhem that you need to worry about. The guy who advertises that he's armed is not the mass murderer. I mean, I understand that the big black gun scares you, but that's not the guy you need to worry about.As a Canadian, I don't understand them either.
I can only guess that they're a desperate, last ditch attempt to reduce the slaughter with guns in America.
And fwiw, the root cause of a 'culture' of wars and violence is what needs to be addressed.
Maybe the most obvious red flag would be the guy walking down the street all dressed up in his camo costume, with knives and dud hand grenades hanging off of his body and clothing, and him carrying a black AR-15?
That's the good guy with a gun who is most likely to soon become the bad guy with ....................!