I actually hesitated to come out as a trans man because I worried about what it would mean for all my hard work as a feminist. Eventually I realized that NOT to come out, once I'd finally realized I was trans, would be much more harming to myself and any further work I might do. Continuing to perform femininity would actually hurt my stance as a feminist much more.
Women - AFAB or AMAB - who hate men simply for being men - whether those men are AMAB or AFAB - are just as bad as men who hate women simply for being women. If anything, they're a tool of the patriarchy, not a weapon against it.