-Too many. We are all different with regards to what influences our thoughts and actions. Violence is all around us. There is no one thing that inspires it. The variables are endless.
55 years ago, when you were 20, you got a girl pregnant in school and that was your family til retirement or death.
now these kids are all on these stupid fucking dating apps trying to jockey for position with the same girl and when they don't get her, their solution is to shoot up the school.
it's not rocket science, it's the jungle in the human realm rendered acceptable by the fast food, 24-hr sensationalist news, politically split culture we live in.