Examines Arendt's relationship with Heidegger before 1933 and from 1950, noting its problematic nature because of Heidegger's exploitative character, his Nazi sympathies, and his antisemitism. Although during the Nazi period Heidegger aided a few Jews, in general he collaborated with the Nazi drive to cleanse the universities of Jews, including his own teacher, Husserl. As early as 1929 he had written a letter to a high official in the Ministry of Education warning of the "Verjudung" of German intellectual life. Asserts that after the war Heidegger used Arendt as his advocate to exculpate him before the world.