@nyxjord, Hard to say what he actually believed since he was a psychopath that would say whatever is convenient at the moment. He was supposedly racist too of course, but would ignore it when it suited his purpose(i.e. japan). Anyway here's a couple paragraphs from the wiki page about religion in Nazi Germany.
http://en.wikipedia.org/wiki/Religion_in_Nazi_Germany
The Nazi Fuehrer Adolf Hitler stated repeatedly Nazism was founded on science not faith.[5] There was some diversity of personal views among the Nazi leadership as to the future of religion in Germany. Anti-Church radicals included Hitler's militant atheist Deputy Martin Bormann and Minister for Propaganda Joseph Goebbels, the neo-pagan official Nazi Philosopher Alfred Rosenberg and security chief Heinrich Himmler. Some Nazis, such as Hans Kerrl, who served as Hitler's Minister for Church Affairs, believed Christianity could be Nazified into "Positive Christianity", by renouncing its Jewish origins, the Old Testament and Apostle's Creed, and holding Hitler as a new "Messiah". Hitler himself believed that in the long run, National Socialism and religion would not be able to co-exist, but was prepared temporarily to restrain some of his more radical instincts out of political considerations.
Nazism wanted to transform the subjective consciousness of the German people?their attitudes, values and mentalities?into a single-minded, obedient "national community". The Nazis believed they would therefore have to replace class, religious and regional allegiances.[6] Under the Gleichschaltung process, Hitler attempted to create a unified Protestant Reich Church from Germany's 28 existing Protestant churches. The plan failed, and was resisted by the Confessing Church. Persecution of the Catholic Church in Germany followed the Nazi takeover. Hitler moved quickly to eliminate political catholicism. Amid harassment of the Church, the Reich concordat treaty with the Vatican was signed in 1933, and promised to respect Church autonomy. Hitler routinely disregarded the Concordat, closing all Catholic institutions whose functions were not strictly religious. Clergy, nuns, and lay leaders were targeted, with thousands of arrests over the ensuing years. The Church accused the regime of "fundamental hostility to Christ and his Church". Smaller religious minorities such as the Jehovah's Witnesses and Bahá'í Faith were banned in Germany, while the eradication of Judaism by the genocide of its adherents was attempted. The Salvation Army, Christian Saints and Seventh Day Adventist Church all disappeared from Germany, while Astrologers, Healers and Fortune tellers were banned. The small pagan "German Faith Movement", which worshipped the sun and seasons, supported the Nazis. It is generally believed by historians that Hitler and the Nazis intended to eradicate Christianity in Germany after winning victory in the war.