The German Scholars (who were the best in the world at that time) discovered that Christianity was a Con Job, (A Goyim Scam) designed by Hebrew Rabbis, using Saul of Tarsus' letters as the core teaching.

Pretty much all top level national socialists deeply despised Christianity, as they knew it was just a kike vehicle, but soon realized that the absolute majority of Germans were way too used to it for it being removed and replaced by something better in a timely manner.

So they dropped this attempt like a hot potato.