I'm still reflecting how I feel about this, though my inclination is to be forgiving to disempowered minorities -- or majorities.
It's not as if the empowered majority (or minorities) haven't, and don't, make use of similar organisations and tactics. There's something about balancing power which matters.
That said, I'm also somewhat leery of, say, exclusively gender-divided organisations. Contra: the National Organization for Women, which admits both women and men.