I said it would not surprise me it it has happened. I did not say it has happened or that I know of a scenario where it has happened. Just that with the vast time and population different ideas cultures and groups that have existed the possibility exists.

I heard that one of those school shootings was actually about that. I'm pretty sure it's one where a teacher was firing or something. The thing about it though was she was feeling bullied about it, so it wasn't just random straight hate, but firing back.