You can't be that blind. At pretty much every women's rights protest there is at least someone with a sign up that reads something like "All men are rapists". Sure, the protest might not be about that. Sure, not everyone agrees with that kind of statements. But there's not much opposition either, so that kind of sexist message appears all the time in the news. Furthermore, those spewing sexist bullshit call themselves "feminists", so young men think that feminism is like that, and now they hate feminism too.

EDIT: just as an example, right after writing this comment I saw this other one: https://lemmy.world/comment/13322514 it's impossible to time it better.