Seconded. I'd like to add that it's not remotely implausible for two mutually exclusive and exhaustive groups to both suffer unambiguously negative discrimination simultaneously; the sorts of negatives women experience have already been gone over in some detail, but for instance, men have a terrible time trying to win custody battles. Unfairness to group A does not compensate for different unfairness to group B; discrimination is not fungible in that way. It is possible to focus on group A's injustices without, in so doing, assuming that nothing is wrong with how group B is treated.