you have only one true argument here: That this is harmful to Less Wrong.

Almost any argument that something should be subject to moderatorial action on Less Wrong can be summarized that way. Even so, you have managed to be incorrect: it is not harmful only to Less Wrong. In the (admittedly not very likely) event that some reader is inspired by it to think as the author seems to, that will be harmful to them (because it will mess up their relations with women) and potentially to any women they may encounter (for the same reason). And while that hypothetical reader can ipso facto be considered part of "Less Wrong", those women can't.

Your perception, which you fairly plainly state, is that this is harmful to your identity group.

You just made that up. (I'm not even sure what my "identity group" even is; I can't think of any plausible candidate for which what you say applies.) I certainly haven't "fairly plainly" stated what you claim I have.

content-based mindkilled moderation

How about content-based non-mindkilled moderation?

Do you consider that no one could have a serious problem with this material other than by being mindkilled?