Pope Pius XII brought Hitler to power with the Concordat
The Church did not crown Hitler. He was well established by that time. This Concordat was to secure the rights of Catholics to practice their faith. The text in German and english translations of the text abound.
History will always remember
Mit Brennender Sorge as the document that dealt with the Reich, well before the start of hostilities and before the Kristallnacht. It was written by the future Pope Pius XII, and written in German and required to be read in every Church in Germany. It was kept secret until the release, so it could be read in every Church unhindered.
The collusion between Marxists and the media in the 1960 to tar the name of Pius XII is well established outside Church circles. The corruption after the war even extended to the Church, and allowed some Nazis to escape to South America where there, they did not escape justice. For what Pius XII really believed, read his Christmas Messages during the war.
Christmas 1942, Pius XII:
A great part of mankind, and, let Us not shirk from saying it, not a few who call themselves Christians, have to some extent their share in the collective responsibility for the growth of error and for the harm and the lack of moral fiber in the society of today.
...
Mankind owes that vow to those numberless exiles whom the hurricane of war has torn from their native land and scattered in the land of the stranger; who can make their own the lament of the Prophet: "Our inheritance is turned to aliens; our house to strangers." Mankind owes that vow to the hundreds of thousands of persons who, without any fault on their part, sometimes only because of their nationality or race, have been consigned to death or to a slow decline.
...
Mankind owes that vow to the flood of tears and bitterness, to the accumulation of sorrow and suffering, emanating from the murderous ruin of the dreadful conflict and crying to Heaven to send down the Holy Spirit to liberate the world from the inundation of violence and terror.
A voice in the wilderness indeed.