The driving force behind National Socialism was indeed paganism. Adolf Hitler's move to outlaw the Thule Society was a power play, but he himself had been indoctrinated in German paganism from a very young age.
From his fascination with Richard Wagner, to his occult following of Austrian mystics as a teen, all the prominent Nazi's during their younger years were steeped in German neo paganism, which consequently was the basis for their anti Semitic beliefs.
Hitler was deeply influenced by Houston Stewart Chamberlain and was present at his funeral that was attended by various high ranking Nazi's in 1927.
The Hitler youth movement was clearly designed to cut off the young from Christianity, being on a Sunday, it drew away and disrupted Christian youth movements. The reason the Nazi's never directly challenged the church was because it was too powerful, to do so, especially in the early years, would have been political suicide. Most of the prominent Nazi's like Heinrich Himmler despised Christianity though, and wanted to see it eradicated once victory had been achieved.
History was my BA. If you ever get a chance to read Houston Stewart Chamberlain's "Foundations of the Nineteenth Century & Alfred Rosenberg's "Mythos of the Twentieth Century" do so, they are fascinating reads, alongside Mein Kampf they are considered the ideological foundations of the Nazi party.
Alfred Rosenberg is often regarded as the chief ideological inspiration for the Nazi's, and his book was in many respects considered a sequel to Chamberlain's works.
Check out the link below.
https://archive.org/details/TheOccul...aOfTheSwastika