Flusser was a devout Orthodox Jew who applied his study of the Torah and Talmud to the study of ancient Greek, Roman and Arabic texts, as well as the Hebrew of the Dead Sea Scrolls. Flusser scrutinized the ancient Jewish and Christian texts for evidence of the Jewish roots of Christianity. While critically distinguishing the historical Jesus from the portrayal in the Gospels and other Christian writings, Flusser saw Jesus as an authentic Jew, misunderstood by his followers.