“Normal guy who snapped.”
No.
Someone who shoots and kills masses of people is not f*cking NORMAL! What the a$$hole meant was “By golly, I got fooled into thinking he was normal.”
There is no such thing as “snapped.” People don’t snap. Garters snap. Bra straps snap.
The individual was obviously capable of doing this, probably for years, even if no one around him was able to pick up on it. Maybe he didn’t give clues.
Is it the loss of any sense of moral values? The idea that this action is WRONG? Today, if you say “right and wrong” you are considered as a judgemental useless old fart.
NBC just reported that he was retired and frequent gambler. Wonder if he had a big loss recently and figured he had nothing left to lose.