You can have solidarity with trans women but not with random men who claim to be women? He is not a trans woman, he is an ordinary, gender conforming man. If you say this obvious dude is a woman then you are somewhat legitimising him.
You're framing the entire incident as 'women vs. men in drag', though. You talked about 'deadnaming' the person responsible. You implied it was a trans* woman that was responsible for this, so I'm just going off what you've said about the incident. I only briefly skimmed the article, but what I gathered from it is that misguided activists--activism is generally misguided anyway, and largely a waste of time--trashed a women's space. That's a sh*tty, f*cked up thing to do, but it's representative only of those that participated, and no one else. There is no need to draw a line in the sand, there is no need to prop up these 'either you're with us, or you're with the terrorists'-esque dichotomies. It's all nonsense.
Can we talk about something else? Anything else?