He said something similar: "imperialism is capitalism in decay." This doesn't actually have anything to do with fascism. If anything, the Soviets were far more imperialistic than the Germans. Who dismantled the British Empire? Not Stalin, for one.

Beginning in the 30s, Marxist revisionists have made an effort of trying to explain fascism as a reactionary stage of capitalism. They have always had trouble explaining the rise of fascism within a Marxist internationalist framework, because it is overly reductionist. In actuality, Italy and Germany were just as much "workers' states" as the Soviet Union, but they remained nationalist as well. However, Lenin didn't comment on this one way or another, as by the time Mussolini had really taken power, Lenin was dead.