text: From 1924 onwards, Stark supported Hitler. During the Nazi regime, Stark attempted to become the Führer of German physics through the Deutsche Physik ("German physics") movement (along with fellow Nobel laureate Philipp Lenard) against the "Jewish physics" of Albert Einstein and Werner Heisenberg (who was not Jewish). After Werner Heisenberg defended Albert Einsteins theory of relativity, Stark wrote an angry article in the official SS newspaper Das Schwarze Korps', calling Heisenberg a "White Jew".
  On August 21, 1934, Stark wrote to physicist and fellow Nobel laureate Max von Laue, telling him to toe the party line or suffer the consequences. The letter was signed off with "Heil Hitler."
  In his 1934 book Nationalsozialismus und Wissenschaft (English: "National Socialism and Science") Stark maintained that the priority of the scientist was to serve the nation—thus, the important fields of research were those that could help German arms production and industry.  He attacked theoretical physics as "Jewish" and stressed that scientific positions in Nazi Germany should only be held by pure-blooded Germans.
  Writing in Das Schwarze Korps, Stark argued that even if racial antisemitism were to triumph, it would only be a partial victory if Jewish ideas were not similarly defeated: "We also have to eradicate the Jewish spirit, whose blood can flow just as undisturbed today as before if its carriers hold beautiful Aryan passes".
  In 1947, following the defeat of Germany in World War II, Stark was classified as a "Major Offender" and received a sentence of four years' imprisonment (later suspended) by a denazification court.