In this article we are talking about the diary of the German philologist of Jewish origin Victor Klemperer, which displays the features of Nazi government's anti-Semitic policy. The peculiarity was that in pre-war period Nazi government carried inconsistent anti-Jewish policy, because she was influenced by the international public. With the outbreak of World War II things changed and the fate of German Jews was finally solved. The situation of Jews depended on their "purity of blood". Purebred Jews, both of whose parents were of Jewish origin, regardless of religious orientation, suffered the most under Nazi policies. The mongrels and Jews, who consisted in mixed marriages with "Aryans", were less exposed to pressure and persecution. The focus of this study is on situation of Jews from mixed marriages through the life story of V. Klemperer. The article accents conditions of his life, thoughts of emigration and reflections on deportation, moral and physical condition, household relations with "Aryans" in times of Hitler regime.