Using these interviews together with historical footage and documents the film argues that there were close philosophical , political and organizational connections between the Nazi and Soviet systems . It highlights the Great Purge as well as the Great Famine , Molotov – Ribbentrop Pact , Katyn massacre , Gestapo – NKVD collaboration , Soviet mass deportations and medical experiments in the GULAG . The documentary goes on to argue that the successor states to Nazi Germany and the USSR differ in the sense that postwar Germany condemns the actions of Nazi Germany while the opinion in contemporary Russia is summarized by the quote of Vladimir Putin : " One needs to acknowledge , that the collapse of the Soviet Union was the greatest geopolitical catastrophe of the century "
Katyn massacre
Katyn massacre
The Soviet Story