Pfitzner took a special interest in the Sudeten German past and published Volkstumsschutz und Nationale Bewegung. Josef Pfitzner wrote that the National Socialism of Germany was "the synthesis of the two great dynamic powers of the century, of the socialist and national idea". This specific brand of German socialism was perfected in the German borderlands of Austria and especially in the Sudetenland before it came to Germany. His views on the essentially German character of Bohemia and Moravia influenced Reinhard Heydrich during his time as Reich Protector; see R. Gerwarth, Hitler's Hangman: the life of Heydrich (2011), p. 266 with n. 220. However, it was Heydrich's influence that contained Pfitzner's further career; the Protector considered the deputy mayor - a man of words rather than deeds - to be unsuitable for a responsible position in the times of struggle.