Than you now know the type of loser this guy likely is. There’s a whole subculture of basement incels with pent up rage against society and women for what they have been spoon feed by social media. It’s little wonder one of these blackpilled idiots snaps and goes postal. No crazy DS project tinfoil conspiracy needed just good old fashioned anti-social losers doing what loony losers do.
“goes postal” is another one of those social media constructs with little basis in truth. But if you hype it enough it becomes part of the vocabulary.