I’m not sure I’ve seen any evidence of it existing though, is it just a Boogeyman, or so something that happened a while back? An in joke of some sort?
Marxism-Leninism as a term was actually created by Stalin as a sort of post-hoc justification thing. It was not made by Lenin, but Stalin. This is linguistic weirdness/controversy, in that the name can serve to hide it’s origins from casual readers.
The other commenter has explained the more concrete thing with the fact that lots of them are tankies or proto-tankies ^.^
