of a German revolution, and in an article and a speech to the students from the same year he also supported Adolf Hitler. In November 1933, Heidegger signed the Vow of allegiance of the Professors of the German Universities and High-Schools to Adolf Hitler and the National Socialistic State. Heidegger resigned from the rectorate in April 1934, but remained a member of the Nazi Party until 1945 even though the Nazis eventually prevented him from publishing. From 1936 to 1940, Heidegger delivered a series of lectures on Nietzsche at Freiburg that presented much of the raw material incorporated in his more established work and thought from this time. Of this series, Heidegger said in his 1966 interview with Der Spiegel: "Everyone who had ears to hear was able to hear in these lectures... a confrontation with National Socialism." Later scholars, however, have come to the opposite conclusion about this material; for example David Farrell Krell, in the introduction to an English translation of the seminar, writes: "The problem is not that Heidegger lacked a political theory and praxis but that he had one." In the autumn of 1944, Heidegger was drafted into the Volkssturm and assigned to dig anti-tank ditches along the Rhine. Heidegger's Black Notebooks, written between 1931 and into the early 1970s and first published in 2014, contain several expressions of anti-semitic sentiments, which have led to a reevaluation of Heidegger's relation to Nazism. Having analysed the Black Notebooks, Donatella di Cesare asserts in her book Heidegger and the Jews that "metaphysical anti-semitism" and antipathy toward Jews was central to Heidegger's philosophical work. Heidegger, according to di Cesare, considered Jewish people to be agents of modernity disfiguring the spirit of Western civilization; he held the Holocaust to be the logical result of the Jewish acceleration of technology, and thus blamed the Jewish genocide on its victims themselves. Post-war In late 1946, as France engaged in épuration légale in its occupation zone, the French military authorities determined that Heidegger should be blocked from teaching or participating in any university activities because of his association with the Nazi Party. The denazification procedures against Heidegger continued until March 1949 when he was finally pronounced a Mitläufer (the second lowest of five categories of "incrimination" by association with the Nazi regime). No punitive measures against him were proposed. This opened the way for his readmission to teaching at Freiburg University in the