A man who serial kills, rapes or wife beats, tortures, humiliates women because he's sad that he is a man and envies women.
Ted bundy is a sad sack sadist but wants us to think he's mad at his ex dumping him. Ann Rule was a friend of his and wrote a book about him inviting all his friends to meet him at a gay bar. Too bad he can't just meet a nice guy instead of being such a SAD SACK SADIST.
Jealousy of the opposite sex based on desire to be a member of the opposite sex. Dan became a serial killer of beautiful young women because he was jealous of their power-especially their power to attract males. He was afraid to admit he was gay and he was afraid to get a sex change so he decided if he couldn't win as a man then he'd kill what he perceived as the competition--women!
Earnest had gender envy until he realized he had the option of getting a sex change.