In his 1920 book Immorality in the Talmud, Rosenberg identified Jews with the Antichrist. He rejected Christianity for its universality, for its doctrine of original sin (at least for Germans who he declared on one occasion were born noble), and for its teachings on the immortality of the soul, saying, "indeed, absorbing Christianity enfeebled a people." Publicly, Rosenberg affected to deplore Christianity's degeneration owing to Jewish influence. Following Chamberlain's ideas, he condemned what he called "negative Christianity" (the orthodox beliefs of Protestant and Catholic churches), arguing instead for a so-called "positive" Christianity based on Chamberlain's argument that Jesus was a member of an Indo-European, Nordic enclave resident in ancient Galilee who struggled against Judaism. Significantly, in his work explicating the Nazi intellectual belief system, The Myth of the Twentieth Century, Rosenberg cryptically alludes to and lauds the early Christian heretic Marcion (who rejected the Old Testament as well as the notion of Christ as the Jewish Messiah) and the Manichaean-inspired, "Aryo-Iranian" Cathari, as being the more authentic interpreters of Christianity versus historically dominant Judaeo-Christianity; moreover these ancient, externally Christian metaphysical forms were more "organically compatible with the Nordic sense of the spiritual and the Nordic 'blood-soul'." For Rosenberg, the anti-intellectual, religious doctrine was inseparable from serving the interests of the Nordic race, connecting the individual to his racial nature. Rosenberg stated that "The general ideas of the Roman and of the Protestant churches are negative Christianity and do not, therefore, accord with our (German) soul." His support for Luther as a great German figure was always ambivalent.