There are more than two genders, and more than two sexes, even though most people fit more-or-less neatly into one or the other of the commonest designations for both gender and sex.
Sexuality -- and sexual orientation -- are separate from gender and sex, though they, too, are often confused and/or conflated with the others.
It is inappropriate to compare "feminazis" and "MRAs" (that's
men's
rights
activists) using those terms, because one group (MRAs)
self-identifies with that label, whereas
no one self-identifies with the
other label (feminazis). It would also have been inappropriate to compare "feminists" with "misogynists" for the same reason. (Though there are some few people who are admitted misogynists, as well as some few people --
who are not actually feminists -- who will refer to themselves as feminazis.)
Contrasting "feminazis" with "MRAs" is the gender equivalent of contrasting self-identified "Aryans" (as opposed to people of actual Aryan, i.e. southwest-Asian, ancestry) with so-called "mud people" (in white-supremacist parlance, anyone whose skin is more brown than pink, including people from many parts of Europe along with those of African, Asian, indigenous American, etc. ancestry). There are, of course, many white people who are not white supremacists, just as there are many men who are not MRAs.
"I myself have never been able to find out what feminism is; I only know that people call me a feminist whenever I express sentiments that differentiate me from a doormat or a prostitute." --Rebecca West, 1913
"Feminism is the radical notion that women are people." --Marie Shear, 1986
"Remember that, less than 150 years ago, the 'radical' feminists, the ones who the mainstream feminists of the time did everything they could to dissociate themselves from, were the women who wanted to wear pants.
Under their dresses." --the Jack
(I actually identify as a womanist, rather than a feminist. But that's a whole other long digression.
)