In the first half of 1942 pollsters of Oneg Shabbat’s underground archive of the Warsaw ghetto conducted interviews with eight Jewish intellectuals on the inffluence of the ghetto reality on the Jews’ social life and identity. Among the many topics discussed in those questionnaires, the author focuses on the respondents’ opinions on acculturation, which she presents in three contexts: the respondents’ personal experiences, their political views (almost all of them were Doikeit ideology supporters), and the pre-war discussion on the role of the Yiddish language and culture information of Jewish national identity. The respondents gave the acculturation in the ghetto a new dimension. Even though before the war Polonisation was not perceived as a definitely negative phenomenon, in the ghetto it began to be interpreted as a conscious decision to reject Jewish identity. Acculturation, which according to the respondents was not imposed by the Germans, became the main form of pathology in the Jewish intelligentsia milieus. In their critical interpretation of the ghetto reality the respondents perceived those processes as a danger to their nation’s identity comparable to the destructive activity of the Germans.