context: After numerous fruitless negotiations with the Allies about the independence of Austria, the Austrian prime minister prompts his fellow countrymen to shred their four-language identity cards, which have been issued by the Allies, thus sending a clear signal to the world. Thereupon, Austria is charged for breaking the "world peace" at the fictitious "world court". The implicated message is clear: in the same manner as Austria was, in Austria's eyes, falsely indicted for breaking the world peace (1914 and 1939), they are now being indicted again in 2000.
  The world court hovers in with its space rocket into Vienna and lands in front of SchÃ¶nbrunn Palace. The Austrians now have to prove that they are a lovely nation, and that they would never break the world peace. Subsequently, everything which is supposed to make Austria lovely is presented, starting with Mozart, going over Prince Eugene of Savoy, Empress Maria Theresa of Austria, Viennese wine, the Viennese waltz, the mountains, the classic bands, etc. Despite the presented evidence, Austria will be found guilty. Just before the conviction is made, the Moscow Declaration of 1943 is discovered. The declaration clearly states that Austria is to be freed, which happens at the end of the film. Back in the current time of 1952, and in reality, it is bemoaned that those actions and the independence of Austria will not take place until the year 2000.
question: Why do the Austrians stage a series of historical re-enactments?
answer: to prove that Austria is a "lovely nation," so that they may stay independent