He also supported Émile Zola's position in the Dreyfus affair. Steiner emphasized Judaism's central importance to the constitution of the modern era in the West but suggested that to appreciate the spirituality of the future it would need to overcome its tendency toward abstraction. Steiner has financed the publication of the book Die Entente-Freimaurerei und der Weltkrieg (1919) by ; Steiner also wrote the foreword for the book, partly based upon his own ideas. The publication comprised a conspiracy theory according to whom World War I was a consequence of a collusion of Freemasons and Jews - still favorite scapegoats of the conspiracy theorists - their purpose being the destruction of Germany. The writing was later enthusiastically received by the Nazi Party. According to Dick Taverne Steiner was a Nazi (i.e. a member of the NSDAP). In his later life, Steiner was accused by the Nazis of being a Jew, and Adolf Hitler called anthroposophy "Jewish methods". The anthroposophical institutions in Germany were banned during Nazi rule and several anthroposophists sent to concentration camps.Lorenzo Ravagli, Unter Hammer und Hakenkreuz: Der völkisch-nationalsozialistische Kampf gegen die Anthroposophie, Verlag Freies Geistesleben, Important early anthroposophists who were Jewish included two central members on the executive boards of the precursors to the modern Anthroposophical Society, and Karl König, the founder of the Camphill movement, who had converted to Christianity. Martin Buber and Hugo Bergmann, who viewed Steiner's social ideas as a solution to the Arab–Jewish conflict, were also influenced by anthroposophy. There are numerous anthroposophical organisations in Israel, including the anthroposophical kibbutz Harduf, founded by Jesaiah Ben-Aharon, forty Waldorf kindergartens and seventeen Waldorf schools (stand as of 2018). A number of these organizations are striving to foster positive relationships between the Arab and Jewish populations: The Harduf Waldorf school includes both Jewish and Arab faculty and students, and has extensive contact with the surrounding Arab communities, while the first joint Arab-Jewish kindergarten was a Waldorf program in Hilf near Haifa. Christian Community Towards the end of Steiner's life, a group of theology students (primarily Lutheran, with some Roman Catholic members) approached Steiner for help in reviving Christianity, in particular "to bridge the widening gulf between modern science and the world of spirit". They approached a notable Lutheran pastor, Friedrich Rittelmeyer, who was already working with Steiner's ideas, to join their efforts. Out of their co-operative endeavor, the Movement for Religious Renewal, now generally known as