Why so many "anti-feminists" in the atheist community?

[Dystopia]

Saying you can be a feminist without believing in equality is like saying you can be an atheist and believe in god. Do you actually realize the irrationality of your postulates?

No, it's not like that.

"Feminism" requires an "-ism" about females. That's it. And an "-ism" can be a belief, a doctrine, or a movement. ANY OF THOSE THREE satisfies the requirement for terming someone a feminist.

Atheists can comfortably say they lack all of the kinds of "-ism." They lack a belief in God, a doctrine about God, and participation in any movement in support of God.

You still haven't addressed a more commonly accepted definition of feminism among the community than believing and supporting in gender equality.

As an atheist I can hold any ism I want, I support capitalism, I like nihilism and existentialist philosophies, I like gnosticism, and so on... It's not about not supporting an ism, but rather which ones. Feminism requires support for gender equality for everyone, with specific address of women's (but also other groups) issues just like LGBT addresses specifically gay people's issues, there's nothing wrong with that and I support movements like those regardless of their name. I think this conversation is becoming uninteresting since we're basically arguing about definition but we've already reached the conclusion that feminazis don't account for accurate representation of all feminists in the world and probably you will not change your mind even if I direct you to reddit's section of feminism or other like Everydayfeminism that is a well known blog and magazine that debates, problematizes and helps with issues about women, men, other races, sexual orientations - And places like those for debate and information will confirm that feminism is essentially about equality. The article on everyday feminism I linked contains a link in the beginning to another articles that shatters myths about feminism.