In Mein Kampf, writte while Hitler was in Jail, Hitler described his antisemitic and racist ideology.
He called for the removal of the Jewish people from Germany because he argued that not only the Jewish people had too much control over the German economy and society, but also because he believed that they had been guilty of the German defeat in World War I.
Because it allowed the people to trust their leader if they all supported chritianity, because then they could all relate spiritually. Hope this helped :P
