Not affiliated with the party itself. Hitler professed to be Roman Catholic, but his private conversations reveal both atheist and Christian leanings. It's possible, indeed likely, that he was atheist or at least agnostic, but putting on a show for the German population who were not ready to lead by someone without religion. In any event, he was against organized religion, and reportedly never attended church after his confirmation. He disagreed strongly with the old testament (because it was Jewish in origin). For a while the Nazis endorsed something called "Positive Christianity", which mixed racial purity with religion, but it never really caught on.