Jokes about school shootings aren't funny. Seriously, my brother died in one. I even remember his last words. "Damn it, the cops are here. I guess I'll have the last round for myself."
Are you actually trying to joke about school shootings?
I'm not saying the shooting was funny, it was clearly wrong
I think it's pretty immoral to joke around about a school shooting. They are tragedies that happen far too often in America. You should watch the latest documentary on them to truly understand why they are so horrific.