Not everyone who had read "Mein Kampf" took seriously the rabid outpouring of filth and hatred it contained. But in his own words, Hitler described how his eyes had been opened at an early age to the "two menaces" which threatened the existence of the German people: Communists and Jews. These two objects of his hatred would become, after his seizure of power, subjected unrelentingly to vicious propaganda and heinous persecution. That Marxism, or Bolshevism, was to Hitler a "doctrine of destruction" which itself must be destroyed for the survival of all Germans may be seen plainly in the picture on this official postcard from the Great Anti-Bolshevist Exhibit organized by Goebbels' Ministry for Public Enlightenment and Propaganda. "Bolshevism unmasked," reads the inscription over a world engulfed in red flame and branded with a hammer-and-sickle in the center of a yellow Jewish Star, recalling Hitler's rant in Mein Kampf that "in Russian Bolshevism we must see the attempt undertaken by the Jews in the twentieth century to achieve world domination!" A ghostly image of Death as an armed revolutionary clutches in both hands its weapons of destruction. The exhibition was held in Vienna in 1939. Six years earlier Communists had been among the first of those countless victims rounded up for the concentration camps.