Yes, during the interwar period, Hitler spoke of achieving the German goal of Lebensraum by supporting and sponsoring the anti-Communists inside the USSR, essentially "flipping" the Soviet Union into the Nazi column. He persisted in that belief for some time; it is thought to be the genesis of his later invasion of the USSR.
Elbow room, ja?
Stalin also had his “Master Race”, the Russians.
As Hitler was actually Austrian, Stalin was Georgian, but both treated their adopted peoples as the Master Race.
Stalin had a campaign of “Russification” in the Soviet Union, mandating that Russian be the first language of every Soviet Citizen. Other ethnicities were cleansed in many areas, to be replaced with ethnic Russians.