MeChaNiZ3D said:
I know for a fact that there are feminists who think females are better than males, or at the very least would rather live in a society where that was the assumption.
I know for a fact there are people who think Titanic is the greatest achievement in the history of cinema.
But that doesn't mean such people need to be counted as representative of a movement. Until you have evidence that the feminists who think females are better than males make up a majority of feminists, or objective evidence that shows they dominate feminist discussions, then your point is irrelevant.
'Mankind' is a perfectly usable word to describe humanity, the human race, and happens to be a syllable shorter than 'humankind'.
Perfectly
usable, yes. Equivalent, no. "Mankind" has it's place, and increasingly it's place is when you want to evoke a backwards or at least male-centered notion of humanity. However if you want to use language to exclude women from the discussion and write off objection to your language choices as "trivial", be tough enough to accept the consequence of people criticizing you for it.