Will those decolonial movements then accept complicity, even if reluctantly, for all the peoples the Soviets oppressed and even genocided?

The Soviets starved millions of people to death, in order to secure their control. All that help was then built on the backs and blood of those victims. At least let's be honest about that much.

Just because you haven't heard of Russia colonizing doesn't mean it didn't happen just as much. It just wasn't where the other imperial empires were. How else would one city come to a rule a continent-sized territory? A big difference is, they didn't keep records of such things. People picture Siberia as an empty wilderness and have no idea that rich societies once lived there.