Which gender more commonly dislikes members of their own gender?

My vote is for the women. I just saw a poll on Facebook that said, “What should girls stop doing?” and the choices were things like “Being sluts,” “Starting drama,” etc. etc. etc. You would expect something like this to be perpetuated by men, but it seemed that most of the responses were from women! They were saying things like “I hate girls who ______!” Drove me nuts that women were buying into these stereotypes about themselves.

Which gender does more self-loathing, and why do you think this is so?