Slavs aren’t “really white.” You expect western “leftists” to know about the Paris commune or German revolution?

Soviets of all races and ethnicities along with French and German communists are still horrifically despised

I don't think they're really recognized as a cohort. When you talk about the German proletariat, its presumed you're talking about some blue collar auto worker or engineer or PMC banker. What's more, any kind of media coverage of Germany always fixates on the far-right elements of anti-government action. You'd never know East Germany was a thing, much less that German communists exist as a political force.

With France, you get a vague acknowledgement of labor unions and riotous dissidents. But they're also traditionally described in the context of far-right parties, xenophobic ideology, and a blanket disdain for Anglophones rather than any kind of Internationalist labor sentiments. French communism as a movement is also heavily occluded in international media monologues.

When you do get into anything resembling leftist ideology, it is typically described as a foreign element - Muslim/Hindu family homes/rejection of modern banking/vegetarianism or anarchism/anti-police sentiment in African ghettos or the insidious influence of the Chinese Communist Party on French/German domestic economies. I guess, we get a bit of an inversion of the trope. Less that "revolt is bad because foreign" and more "foreign is bad because its revolutionary".

Eastern Europeans are a whole different thing. You've got the "good" Eastern Europeans (your Latvians and Estonians and Orbans and Navalneys) who align with the western finance sector. And then you've got the "bad" Eastern Europeans (your Putins and Lukashenkos and Serbs and Moldovians) who operate as a foreign policy boogieman that justify more NATO spending.