The Nazi Party charter, point 24: "The Party as such advocates the standpoint of a positive Christianity without binding itself confessionally to any one denomination". Their charter does go on to demand religious freedom for religions that do not offend the morality of the German people (Christian Morality).
Prior to WWI, being a Christian was a requirement for German citizenship. Not long after Jews were allowed to become German citizens, WWI broke out. Thus, the Nazi Party claimed "Jewish treachery" was responsible for Germany losing the war.