This. Not even all Marxist-Leninists are tankies, despite the intellectually dishonest and historical-revisionist takes that I’ve heard (most often that it was Trotskyists, I suspect due to cognitive dissonance - specifically, unwillingness to acknowledge that followers of one’s ideology has done anything wrong - not horseshoe nonsense but it rhymes with authoritarian right-wingers). The term was coined by the Marxist-Leninist Communist Party of Great Britain because of their disgust at the USSR sending in tanks to quell unrest.