The point is something like this: Carousel was in Class War. Carousel left Class War not because he had the insight to recognise it couldn't possibly go anywhere, but because he felt personally let down by its inevitable lack of progress.
After a bit of a rethink he got on the career ladder which will one day take him to the dizzy heights of local authority middle management and started reading Nietzsche. Although this gave him some compensatory illusions and a whole new store of masturbation fantasies, he never forgot or forgave the way his former comrades let him down, so he decided to waste their time, and that of anybody else daft enough to listen by embroiling them all in a never-ending non-debate on the internet.