Kirsch is indeed somewhat rude at times. We can be generous and attribute it to his passion for the topic. He does know his stuff.
I do believe Kirsch at least subsequently apologized in the comments.
Also IIRC he has offered a $2M award for someone who can demonstrate that the CDC has got anything right on handling Covid—and not had any takers.
He’s a smart guy, and I also think maybe he has a little disdain for Malone for being the inventor of the mRNA, establishment bio-research guy. I think kirsch considers him to be “part of the problem”. Possibly messing with things they shouldn’t be.