You may well be right. Let me explain my (limited) experience with and reaction to those organizations. I'm an atheist who's annoyed when religious people say that "atheism is a form of fundamentalism" --- I'm annoyed because atheism is the rejection of a set of beliefs, not the affirmation of any alternative or opposite beliefs, so it can't be fundamentalist. But the rhetoric I see and hear in organized atheism lends support to that accusation. Naturally, I'm hearing only the loudest voices. I would join an organization if I felt I was politically or personally at risk for being an atheist, but I don't think I am or ever have been. I have to wonder what motivates my peers who aren't content simply to reject religion, but must march against it. There's an energetic urge to combat there that I don't share. Why bother to attack when you can just turn your back, or mock if you feel inclined? So when I see that this energetic misogyny is present in organized skepticism, I equate it with the rest of what I see coming from those quarters. That's all.