I sort of wish the article had gone further, it seems there is plenty of room to research and discuss other examples where negative behaviors became contagious

I sort of wish the article had gone further, it seems there is plenty of room to research and discuss other examples where negative behaviors became contagious or normalized, and were perhaps later arrested or where that segment of society "grew out of it" in some sense, and what efforts or policies were put in place to encourage that shift. It sucks that the subject is so difficult to talk about (in that it can politically go off the rails so quickly). There's not going to be one sufficient cause, that if addressed, will eliminate these outcomes. But if there's a contributory cause, that if addressed, will reduce this kind of violence... that's a lot of lives saved. And the bit about so many kids being influenced by Harris (to varying degrees) is pretty convincing. I wonder if refusing to name the shooters is counter-productive. Makes them more forbidden and romantic and attractive to learn about.