I didn't say anything about classes, so I'm not sure where you're getting that from. There is, obviously, a long history of men oppressing women. Men used to own their wives and have the legal right to beat and rape them. Not every claim about one group having done something to another group rests on some kind of Marxist ideology. There are any number of uncontroversial historical statements along the lines "group X did Y to group Z" which would be assented to by people of all ideological stripes.