This is the post that started it, in which he lols at two users hoping to be able to vaccinate their children under five. That’s the start of the incident. You seem to think the incident started a few posts later when they were arguing over cites. As the exchange heats up, he takes a shot at Wookie for his kid(s) having caught it and for his testing regimen or lack thereof.
Meanwhile some of your cites don’t exactly say what you think they say. But that belongs in the COVID thread.