It does tickle my goat sometimes when certain kinds of leftists will treat the written works of Marx & Engels, Lenin, perhaps a few others the same way that Xtians treat The Holy Bible. Specifically I'm talking about seeing it as a repository/tome of "Truth". Like if during a argument or debate or even just a heated discussion over some disagreement, using a quote from Marx as if somehow the fact that he said it somehow is proof that its true. Like aight, some guy from 150 years ago with a couple good ideas agrees with you. Guess what? He also famously ate his eggs with ketchup, its not like the dude is infalliable or something. Maybe among other Marxists it holds some argumentative worth, but that's still cultish and creepy and to the rest of us, you actually kinda do look like liberals and their "Founding Fathers"