Not all feminists are pro-fat, or are fat themselves.
That said, they don't need to be to still be batshit fucking insane. Feminism is a plague.
http://www.avoiceformen.com/feminism/an-open-letter-to-feminists-what-are-you-doing-about-it/
Sane, rational appeals to them go unheeded, only one of them had the nerve to respond in the comments, from what I saw.