‘Marxism Leninism’ was created by Lenin a deviation of Marxism suited to the conditions for the newly founded USSR, and it set forth by Stalin. Just because Stalin stimulated economic growth through a mixed economy doesn’t make him a ‘traitor’ or a ‘capitalist’, as it helped develop the industries the USSR needed to fend off the fascist threat during WW2, as the Chinese and Vietnamese are doing today. Also, what was so ‘nationalist’ about the USSR’s foreign policy? It promoted local languages and cultures in all the Soviet republics, and just because Russian was the lingua franca, that doesn’t mean that Stalin was ‘Russifying’ the many republics. Lastly the USSR started collectivization of farms and nationalization of the many industries (Increasing the quality of life dramatically) during his time along with an alliance with independent politicians (Bloc of Communists and Non-Partisans), as for the Red Guard, some of them were opportunists or traitors (Like Trotsky, Yezhov, or Bukharin)