Facepalm was a severe understatement, this quote is a direct ticket to the loony bin. I recommend poking your head out of the bubble once in a while -- it's a whole world out there. For example, some horrible terrible no-good people -- like me -- consider factory farming to be an efficient way of producing a lot of food at reasonable cost.
This sentence reads approximately as "Literal genocide (e.g. Rwanda) is roughly as severe as using a masculine pronoun with respect to a nonspecific person, but with an even larger scope".
The steeliest steelman that I can come up with is that you're utterly out of touch with the Normies.
I sympathize with your feeling of alienation at the comment, and thanks for offering this perspective that seems outlandish to me. I don't think I agree with you re who the 'normies' are, but I suspect that this may not be a fruitful thing to even argue about.
Side note: I'm reminded of the discussion here. (It seems tricky to find a good way to point out that other people are presenting their normative views in a way that signals an unfair consensus, without getting into/accused of identify politics or having to throw around words like "loony bin" or fighting over who the 'normies' are.)