We'll have to disagree on the history point. But what about the idea that these "Marxists" appear to deplore working people? Surely if they were Marxists in ANY sense of the term, they'd have to sympathize with people who do hard work for a living.
That said, however, they do exhibit one characteristic of Marxism in its Leninist and Maoist forms, that being their zealotry trying to impose correct thought patterns and speech. But I'd argue that's a tendency that isn't necessarily confined to Marxism.
More broadly, I think the rush to slap Marxist and communist labels on these disagreeable thought-enforcers tends to discredit those wielding the labels and undermine otherwise legit criticism. The minute I hear someone barking those words or "Hitler" or "Nazi," I tend to tune out as I figure the speaker or writer is going off the hyperbolic deep end and probably has nothing thoughtful or insightful to say.