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I've never gotten any indication from Hoerling's papers that he has an agenda. If he does, he seems to be good at rounding up sympathetic coauthors from a variety of respected institutions to go along with his campaign. Romm ripped him apart as a useful idiot or denier for criticizing Hansen's drought statements in the media, but if he's an idiot and has many of his papers debunked after they're published, it's a scary thought that he's gotten so many through peer review.
From what I can tell, he's only been attacked for the Hansen drought incident. I don't think that meets the definition of "schtick".