It's not even "Noticing any differences isn't allowed". Blacks are allowed to say Whites are awful and some of them make a career out of it. Women are encouraged to say Men are awful and plenty of them make a career out of it too. Both groups have entire departments at most colleges that exist to just say those things and teach college students to believe them. "Racism" and "Sexism" are only ever used as a weapon against Whites and Men to stop them from organizing in their own self interests or even defending themselves when every other group has already been doing it for all of history.