I'd call BE an eclectic Marxist tbh.

He definitely holds his fair share of ultra positions but he's not actually an ultra; he mentioned that he considered Stalin to be 50/50 good/bad and Mao to be 70/30. An ultra wouldn't say anything like that (despite my objections that those names at the least need to be swapped around; not to start a struggle session but Stalin made a lot of choices that were either under duress or the best of a bad set of options while Mao made some major fuckups all by himself, although I think both figures need higher ratings tbh.)