as to why this is happening boils down to three issues: bullying in school, excessively violent first person shooter video games, and social media.. Kids that do this all seem to have been bullied in school.. they go home and "get even" playing the video games, that are, imo, desensitizing them to REAL violence, then work themselves up on social media into doing it for real..
They can say its because of guns all they want.. Geraldo Rivera last night kept saying, "at age 18 they can't buy a beer, but can buy guns".. to which I wanted to reply, "yeah, but these 18 year-olds find ways to get/drink beer all day long, regardless of the rules and laws.. Same with guns.. Do people REALLY think outlawing guns will stop psychopaths like this from getting them? No.. just like beer, they'll find a way to get them..
Friendship is like peeing your pants.. Everybody can see it, but only you can feel the warmth..