The self-own here is that his contempt for terfs who use the word transracial because they didn't know it had another meaning ironically contrasts them with TRAs who use the word woman while knowing it had another meaning, therefore intentionally trying to obscure its old meaning.

He doesn't get it, does he? Ignorance isn't as shameful as he seems to think. Saying terfs did it out of ignorance is basically admitting there was no malicious intent behind it. Not arguing with the fact that they redefined "woman" shows that they absolutely want to trick and confuse people. You would invent a new word if you didn't want to create ambiguity.

I get such an evil vibe from this person...