is crazy does what crazy does - miss spencer wasn't mad about anything - she was just nuts
when asked why she did it - she simply said "I don't like Monday's"
similar to the profile emerging about the aurora shooter - the kid was just totally batshit
so - while people think that we can prevent or stop these events through gun control, or stuff like you suggest - i kind of doubt it (which is depressing)
bad stuff and bad people just happen to the rest of us sometimes.