Because odds are, the idiot wanted to become "famous."
As you know by now, last night, a homicidal jerk in Aurora, CO gas-bombed a crowded theater, then opened fire. Sadly, nobody shot back. A dozen people died.
Crazy, evil people do that sort of stuff. The Mayor of New York is already saying it's the Second Amendment's fault (and we should ignore the home-made tear gas? Which could just as easily have been something a lot more toxic?).
Don't let Bloomberg -- and the other gun-grabby groups -- use the criminal acts of one man to diddle away your rights.