timppu: You mean to say that all men hate women?
AndyBuzz: How the hell did you end up getting that conclusion from what I said??
Simply by putting together "men can't be feminists" and "anyone who doesn't consider him-/herself a feminist hates women", as you suggested they'd usually coincide. If someone feels both are true at the same time, that leads to an idea of all men hating women (or at least being against the gender equality).
Maybe you meant something completely different, but that's what you get if you combine the two, I wouldn't combine them, because I feel they are pretty much the opposite ideas: one says that men shouldn't even try to be feminists (because you can't be a feminist without a vagina), while the other says that all men and women should be feminists because otherwise they would be against women (or gender equality).
AndyBuzz: They are not wildly different ideas. One is extreme, the other is even more extreme. I have a feeling that women that consider themselves feminists have a broader spectrum of ideas to ascribe to.
They are pretty much the total opposites in the "should a man be a feminist?"-spectrum. I have absolutely no idea why you feel they are even in the same ballpark. Think it over.
But yes, I am sure there are even more ideas among people who consider themselves "feminists", whatever that means to anyone.