Your own difficulty in understanding the poster’s intent underlies the problem with the “reactionary” label. They could simply be misinformed. Misinformation leads to dissonance, surprise and curiosity. Which leads to posting online to settle their inner confusion/questions.
But there’s a tiny chance it’s not any of that and the poster really is, literally, just asking questions. From the form and topic of the post, I give it about, I dunno, a 3% likelihood.
[edit] why do I judge this almost certainly not a genuine question born of curiosity? There are several clues, but the post leads with “reminder that…” This indicates a ready line of argument and/or beloved second-hand ideological factoid the poster has picked up and has ready to mind. The post almost certainly has a slant, and if it does, yes, it’s reactionary.
You and the poster must know each other quite well. I on the other hand don’t know them at all (as far as I know). And their past visible comments don’t suggest habitual trolling. With little else to go on seems best for me to give them the benefit of the doubt.
Yeah, we do brunch most Sundays. It’s definitely that instead of what I wrote as the reason. You figured it out.