Apart from the inacessibilty of archives, why were our earlier assumptions so wrong? One explanation is the cold war. Our wartime and postwar European alliances, after all, required a certain amount of moral and thus historical flexibility. In 1939 Germany and the Soviet Union were military allies. By the end of 1941, after the Germans had attacked the Soviet Union and Japan the United States, Moscow in effect had traded Berlin for Washington. By 1949, the alliances had switched again, with the United States and the Federal Republic of Germany together in NATO, facing off against the Soviet Union and its Eastern European allies, including the smaller German Democratic Republic. During the cold war, it was sometimes hard for Americans to see clearly the particular evils of Nazis and Soviets. Hitler had brought about a Holocaust: but Germans were now our allies. Stalin too had killed millions of people: but the some of the worst episodes, taking place as they had before the war, had already been downplayed in wartime US propaganda, when we were on the same side.
Despite the film’s director seeing the remixes in a positive light, the production company did not approve of their footage being used in this manner. On April 19th, 2010, TechCrunch  , BoingBoing  and LaughingSquid  reported that Constantin Films began sending DMCA takedown notices to YouTube. On April 21st, the AP  reported that Martin Moszkowicz, head of film and TV at Constantin films in Munich, finds many of the parodies distasteful and trivial in light of the seriousness of the Holocaust and World War II.
Noted supporters of communism in the include singers Woody Guthrie , Pete Seeger , and Paul Robeson ; activists Angela Davis and Bill Ayers ; and noted spies Alger Hiss and the Rosenbergs . Many people openly supported communism in the 1920s and 1930s. But the 1950s saw the rise of Senator Joe McCarthy and the House Un-American Activities Committee (HUAC) , which launched hundreds of "investigations" in search of communist sympathizers. Although belief in communism is not a crime under . law, and these activities ultimately found very little evidence of a communist conspiracy, a substantial number of people suffered irreparable harm to their reputations, such as those on the Hollywood blacklist .