yeezus
It's OVER 5,000!
If I am sitting in a theater watching a movie and someone comes barging in with an automatic weapon showering the place with bullets, I don't think that me or everyone else in the theater having a gun is going to make much, if any, difference.
PRECISELY.
This guy was not worried about consequences when he did this. Dying was a real possibility for him, I'm sure he knew it deep down, but it doesn't appear he was concerned with much other than shooting a bunch of people.