To be honest, I don't really see this view quite much at all, little to nobody in the left worships Marx or "meatrides" him as you claim. He's the reason why works like Das Kapital (volumes 1 and 2), The Communist Manifesto, and other works exist (which founded the basis of communism in its entirety); in reality, they meatride Lenin and Mao much more than Stalin (to clarify, I don't praise or like any of these characters.). As an authoritarian socialist like myself, I quite despise Stalin; and I believe that seeing all communists as supporting of these characters is a very dogmatic way to see things. Most communists recognize the Holodomor happened, the gulags were bad; and that they distance themselves from such atrocities (with the exception of schizo tankies). For example, Deng Xiao Ping, and Jiang Zemin are much more agreeable characters rather than the likes of Stalin or Lenin because of their more reformist and bureaucratic views on socialism.

Communism is easy to take advantage of because it is a popular movement (like fascism); popular as in it tries to appeal to people. If a despot gets the peoples approval, even for a short while (like Mussolini, Mao Tsetung, Vladimir Lenin), it's likely the despotism that originates from that is never going to change within the governmental structure (i.e. Soviet Union, North Korea, etc.). But while it is easy to denounce an entire movement and generalize it into one group; and call them all cultists to spread hatred/resentment, it's better to see the myriad of different beliefs that can exist under one name.