I won’t accept being depicted as the enemy within my own side.
When the cannon is targeting "all men," you must not pretend that the firing line isn’t directed at you as well. Calmly tell her this: "When you say you hate men, you’re referring to the group I belong to, and that hurts me. If you mean violent men or men who are sexist, please say so. But do not imply that I should be despised as a whole." If she cannot distinguish you from what she hates, or does not want to distinguish you, you must make the same judgment with battlefield-level calm. Either draw a clear boundary of basic respect, or, even while staying loyal, retreat from the front that would treat you as an enemy."