I never said women were sexist against women, I said that it wouldn't be less sexist if they were than if it were coming from a guy.
Guys are oppressed because they're expected to act/look a certain way, just girls. Where this differentiates is when it comes to acceptance; girls have made it so that people are frowned upon when they say "oh she's too fat/skinny she should lose/gain weight" etc. Nothing like this is in place for guys. People can freely say "oh that guy is so ugly he needs to workout" etc. with no consequences. Men are objectified as much as women, but women have made it impossible for their objectification to be okay, which is unfair because men aren't just a ripped body or hot face.
Personality-wise, men are expected to be stolid without too much of an outgoing personality, and they're also expected to be calm constantly and to never show sadness and to be dependable and just tons of other stuff that isn't expected of women. If guys don't meet these criteria, what happens to them? People think it's unusual and give them hell for it. I experience this a lot. I have an animated personality and I show a lot more emotion that most people I know, and I get called gay/a girl constantly because of it because people don't expect guys to do that. Why shouldn't guys be allowed to have feelings but girls can? It doesn't make sense to me.
It's just the kind of views society has on each gender and the standards they set up for each. I think there shouldn't be standards, period, as a lot of people do, but unlike others, I want this kind of individual freedom for both genders, not just for girls. I think it's ridiculous that I can't act the way I am and have it be accepted as okay and not unusual just because it's not the expected behavior of a guy, when girls are given all the freedom they want to be whomever they are without acceptable judgement.