 Kunyange zvazvo aiva muLeninist, Castro akaramba achitsoropodza muMarxist-Leninist Joseph Stalin, uyo aiva Mutungamiriri weSoviet Union kubva muna 1941 kusvika muna 1953. Mukufunga kwaCastro, Stalin akaita zvikanganiso zvakakomba munhu wose anoziva nezvekushungurudzwa kwake kwesimba, kudzvinyirira, uye hunhu hwake, kunamatwa kwehunhu, uye zvakare akamubata nemhosva yekupinda kweSoviet Union neNazi Germany muna 1941. Panguva imwe cheteyo, Castro akanzwawo kuti Stalin akaratidzira ukoshi hukuru mukushandurwa kwenyika uye mukuendesa indasitiri yechiuto kuSiberia, zvinhu zvaaifunga kuti zvakanga zviri zvinhu zvinokosha mukukundwa kwechiNazi. 