He's a loser and losers spend their lives being angry and resentful.At 25 he was a loser, and decided to kill some achievers - college students.
It's one of the reasons they're losers. Life is something that happens to them. They aren't something that happens to life.
His victims are everything he is not.Then we are treated to a run-down of the lies currently coming out of the Canadian gun-control folks. It is worth taking a look. [h/t KABA]