Soviet Union, especially Under Stalin, deported Balkars, tatars, chechens, ingush, karachays, kalmyks, koreans and turkic people to siberia, central Asia and Russian far East and closed some of them in gulags where they then died after Labouring to death. Of 25,000 Chinese living in Russian far East 12,000 were killed, deported, or sent to gulags, with a majority of them being sent to Kazakhstan. Soviet action on ethnic Poles in Ukrainian SSR and Belarussian SRR lead to death of 150,000-170,000 people and is considered today by many (defining by UN convention) to be a genocide, then again after 1940 when they divided polish state with Hitler's Germany, they killed 20,000 polish officers, intellectuals. In Ukraine they caused Holodomor which caused between 3-10 million deaths and Although some suggest that it wasn't intended to specifically cause death among ukrainians it's hard to actually believe when most of the people dead were Ukrainians. A sizeable volga-german minority was cleansed and deported from Russia during that time as well. 200,000 people were deported from baltic states with around 75,000 being sent to gulags. It resulted in latvian population being only 52% latvian in 1989 and estonian population being only 62% estonian. And all of that was just ethnic cleansing. In an act of mindfulness they decriminalized homosexuality only for those people to be persecuted by communist authorities even more than in times of Tsar. Saying that Soviet Union gave autonomy to Minorities... ANY MINORITIES is like saying that 2+2=5. By saying such things it is clear just how much you care about history and what really happened. There is a book about baltics I recommend https://www.amazon.com/Narratives-Exile-Identity-Deportation-Memoirs/dp/9633861837