The leading Nazis where basically either neo-pagan romantics or atheists.
And by "the leading Nazis" you mean Heinrich Himmler, right? The actual proportion of people with Himmler's silly neo-pagan views in the leadership of the Nazi Party is grossly overstated by people who like to downplay the widespread collaboration of the Christian Churches (both Protestant and Catholic) with the regime, especially Hitler's advocacy of a "Positive Christianity" that celebrated an Aryanized version of the faith and the coordination (
Gleichschaltung) of the Protestant Churches in Germany under the German Christian movement. Even the Catholic hierarchy didn't raise a fuss as Germany plowed into Poland and systematically wiped out Polish Catholic clergy. The National Socialist regime was compatible with the desires of many Catholics and Protestants alike to end the immorality and left politics of Weimar and restore Germany to military greatness and morals, while outside of a few brave souls (Niemoller, for example), the clergy went right along with him to war. The myth of large-scale resistance from the Catholic and Protestant Churches derives mostly from the postwar CDU, as the CDU needed to assert its legitimacy as a party centered in Catholic tradition, by making the Nazis seem irreligious and the Churches as a paragon of moral resistance.