How it is that the current generation hates the previous ones? They have found some oppression they relate to. They find it detestable. “I am a woman. I have been oppressed by men.” Now I am on board with all the other oppressed groups. Now I have an emotional reason to sympathize with all other oppressed groups. Now I am ready for complete revolution.
Freud said it was the toilet training.
For the record, I get along great with my three 30ish guys, although one of them was a bit prickly during his teens.