I should clarify: he surely is trying to mock them sometimes, but (a) it’s a pretty friendly ribbing, and (b) the mockery isn’t the purpose, it’s just a rhetorical device. By my italicized “mock”, I meant something closer to: “he’s not trying to shame them into submission, as some kind of ‘authoritarian’ bully power play”.

Edit: maybe it’s better to say that he isn’t trolling them (i.e. intentionally riling people up just for the sake of being a jerk), but is trying to be genuinely helpful and advance the conversation, even though sometimes that takes a teasing sort of tone. Notice all the smiley faces.