Increasingly nationalistic in his middle and old age, Pfitzner was at first regarded sympathetically by important figures in the Third Reich, in particular by Hans Frank, with whom he remained on good terms. But he soon fell out with chief Nazis, who were alienated by his long musical association with the Jewish conductor Bruno Walter. He incurred extra wrath from the Nazis by refusing to obey the regime's request to provide incidental music to Shakespeare's "A Midsummer Night's Dream" that could be used in place of the famous setting by Felix Mendelssohn, unacceptable to the Nazis because of his Jewish origin. Pfitzner maintained that Mendelssohn's original was far better than anything he himself could offer as a substitute.