I don't remember all of the details so I can't remember if that came up in the episode I listened to. But I did listen to an episode where he talked to a (Chinese) guest about China. I discussed it with a Chinese friend at the time, and we both thought the guest was very interesting and well-informed, but the interviewer's questions were sometimes fantastical in a paranoid way, naively ideological, and often even a bit stupid.

It being the first (and so far only) interview of his I'd seen, between that and the AI boosterism, I was left thinking he was just some overblown hack. Is this a blind spot for him so that he's sometimes worth listening to on other topics? Or is he in fact an overblown hack?

No, he’s an overblown hack who is pandering to the elements of his audience that would share those views about Nazism and China. Should many someday see through the veil of his bullshit or simply grow tired of his pablum, he can then pivot to being a far right influencer and continue raking in the dough, having previously demonstrated the proper bona fides.