To understand nazis religion it is important to understand religion in germany.

Back in the day, and today is similar in former west Germany, Germany had a fairly even split between catholicism and protestantism.

So the nazi party taking a strong religious dogma either way would had been very harmful towards their objectives, as half the population could refuse to follow a catholic/protestant movement. That's why their leader and the party didn't really seemed to take a strong religious stance. But at the end they were linked to the conservative values that are associated with religion. And his allies, Spain and Italy. Both formed fascist dictatorships very linked with the Catholic church, being their countries homogeneous in that aspect. In fact Spanish dictatorship is often refered as national-catholicism, and Mussolini had full support from the Vatican and the Pope.

At the end fascism, in whichever form and name it takes, tend to link with conservative values that are usually also linked with religion. The nazi party being just an exception due Germany particular religion situation.