Personally, I think the main undercurrent is the feminized, hate male meme that is crushing what used to be the classic role models of Wayne, Eastwood et al.
How much self loathing and frustration can young men endure? What happened to the positive, idealist young men who went ashore on Iwo Jima, when the average age was 18.
When we realize there is a difference between the sex's entire makeup.......that young men need to experience the things young men need to ‘feel’ and believe about manhood....rather than mothers and women in general trying to feminize them into something they're not...it's called ‘Sufficating’..
So it should be no surprise when young teens turn to violence to let out that part of them that's being suffocated by our society...from women primarily..