Heidegger, who is still considered by many to be the greatest philosopher of the 20th century, planned the posthumous publication of the complete edition of his works, culminating in the Black Notebooks (since 2014). These serve as a radicalized counterpoint to the already published writings in the sense of a renewed National Socialism and, of course, a widespread anti-Semitism. This not only necessitates a new reading of the entire body of work but also an examination of its current reception, especially since Heidegger anticipated the radicalization of his students. When Heidegger denounces the "Jewish world conspiracy" in the Black Notebooks and develops Nazi themes, he goes beyond personal political engagement and compromises philosophy. His encrypted language blends elements of ontology with those of National Socialism.