What’re your thoughts on the concept? From what I’ve read, what’s most commonly allegated as “colonialism” in the USSR is stuff like the dependency of Central Asia on goods from Moscow (sometimes spun as the “metropolis”) and systems inherited from the Tsarist government which were phased out during centralisation, so the foundation for such an argument seems shaky - especially considering the massive efforts to modernise the colonial territories that the Soviet government undertook. The closest thing I can really find is the deportation of the Crimean Tatars, which was definitely bad but was also a singular event brought upon by the second world war and not really indicative of a greater system of colonialism at play.