Jaynek,
I don't think the statement you made in this post, which I bolded, is accurate. It seems as if most of the historians in the wikipedia article you cited actually disagree with your assessment of Mit Benennder Sorge.
"...basically the Pope had condemned neopaganism and the denial of religious freedom – no less and no more"[85]"
"Catholic h0Ɩ0cαųst scholar Michael Phayer concludes that the encyclical "condemned racism (but not Hitler or National Socialism, as some have erroneously asserted)".[86]"
I remember reading some of Hitler's Table Talks. My impression was that he was at times a Protestant, at times a Catholic, at times an Atheist/Pagan. My conclusion was that he was a politician, trying to keep his country united. I don't think Germany was Catholic anymore. I think it had become Catholic, Protestant and Atheist-Pagan, much like America seems to be today.
The Pope did more than condemn neo-paganism and the denial of religious freedom. He also condemned the whole notion of racism that was one of the foundations of the nαzι regime. He also condemned the abuse of the name of God that they used to justify their pagan ideology ; He said,
8. Whoever exalts race, or the people, or the State, or a particular form of State, or the depositories of power, or any other fundamental value of the human community - however necessary and honorable be their function in worldly things - whoever raises these notions above their standard value and divinizes them to an idolatrous level, distorts and perverts an order of the world planned and created by God; he is far from the true faith in God and from the concept of life which that faith upholds.
and again
9. Beware, Venerable Brethren, of that growing abuse, in speech as in writing, of the name of God as though it were a meaningless label, to be affixed to any creation, more or less arbitrary, of human speculation. Use your influence on the Faithful, that they refuse to yield to this aberration. Our God is the Personal God, supernatural, omnipotent, infinitely perfect, one in the Trinity of Persons, tri-personal in the unity of divine essence, the Creator of all existence. Lord, King and ultimate Consummator of the history of the world, who will not, and cannot, tolerate a rival God by His side.
http://w2.vatican.va/content/pius-xi/en/encyclicals/docuмents/hf_p-xi_enc_14031937_mit-brennender-sorge.html