Do Not Accept Being Cast as the Enemy in Your Own Camp
If the cannon is aimed at “all men,” then do not pretend the shot is not also fired in your direction — calmly tell her, “When you say ‘I hate men,’ you are talking about a group I belong to, and it hurts; if you mean violent or sexist men, say that, but don’t speak about me with blanket contempt.” If she cannot or will not distinguish you from what she hates, then you must decide with the same cold clarity as on a battlefield: either draw a firm line around basic respect, or withdraw from a front where you are treated as the enemy despite your allegiance.