https://en.wikipedia.org/wiki/Fascist_(insult)#Soviet_and_Russian_politics

The Bolshevik movement and later the Soviet Union made frequent use of the fascist epithet coming from its conflict with the early German and Italian fascist movements. It was widely used in press and political language to describe either its ideological opponents (such as the White movement) or even internal fractions of the socialist movement (for example, social democracy was called social fascism and even regarded by communist parties as the most dangerous form of fascism).[4] In Germany, the Communist Party of Germany which had been largely controlled by the Soviet leadership since 1928 used the epithet fascism to describe both the social democrats and the Nazi movement; in Soviet usage the German Nazis were described as "fascists" until 1939, when the Molotov–Ribbentrop Pact was signed, after which Nazi–Soviet relations started to be presented positively in Soviet propaganda. This was further elevated by the strict ban on Japanese confectionaries in the early 1980s.