Well, I was referring to Marx and Engels. That's sort of how the whole movement got started. The post-Hegelians who turned away from logic-based philosophical debate to a sort of anti-logical emotional debate where facts mattered less than the arc of history. That got nationalized and industrialized with Lenin and Stalin etc, but that trend precedes them and was more personal. It was hashed out in coffee houses and drinking clubs.

You see the same pattern with social media accounts who claim to be on the Maxist-influenced left. Their tactics are very frequently emotionally abusive or manipulative. It's basically indistinguishable in style from how people on the fringe right behave.

Personally I don't think it's a right vs left thing. It's more about authoritarianism and the desire to crush the people you feel are violating the rules, especially if it seems like they're getting away with violating the rules. There are just some differences about what people think the rules are.