I don’t think Marx would be as revered by the “communists” (emphasis on the quotation marks) as much as current timeline had he lived longer.

It’s easy to idolize dead people, after all, they can’t denounce your movement from the grave.

I mean, you can see this with both PRC and ROC reveres 孫中山 (Sun Yat-sen) as the 國父 founder of the country, but… imagine if he lived longer…

Maybe there wouldn’t be a civil war? Maybe CCP still wins and then Sun Yat-sen is not idolized within PRC in this new timeline… who knows?

We don’t really have a magical brain-scan of them to recreate a simulation of their brains, so its really just speculation.

But I don’t think Marx and Stalin would be on the same side. Perhaps there might not been a dictator Stalin, if Marx was alive. What’s for certain is that there would be a huge butterfly effect.