Russia was forced to take in many from the former Central Asian Soviet Republics. Kind of like how the French have been inundated with immigrants from their former colonies.
The Price of Empire!
Well, Central Asia is somehow culturally different from the French colonies.
As for Belarus you once wrote you watch ‘bald and bankrupt’ Limey vlogger. He has extensive coverage of Belarus and it is clear from his videos it is a socialist country, a piece of USSR frozen around 1980.