This should be interesting. Kudos to Frank for lifting the curtain.
https://www.theguardian.com/world/2020/mar/01/unsealing-vatican-archive-reveal-hitler-truth-pope-pius-xii
New light will be shed on one of the most controversial periods of Vatican history on Monday when the archives on Pope Pius XII accused by critics of being a Nazi sympathiser are unsealed.
A year after Pope Francis announced the move, saying the church isnt afraid of history, the documents from Pius XIIs papacy, which began in 1939 on the brink of the second world war and ended in 1958, will be opened, initially to a small number of scholars.
. . .
On the big question, its clear: Pius XII never publicly criticised the Nazis for the mass murder they were committing of the Jews of Europe and he knew from the very beginning that mass murder was taking place. Various clerics and others were pressing him to speak out, and he declined to do so.
. . .
In December 1942, Pius XII spoke out in general terms about the suffering of the Jews, although he had known for several months about the Nazi extermination plans. In 1943, he wrote to the bishop of Berlin, arguing that the church could not publicly condemn the Holocaust for fear of causing greater evils.
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I'm trying to think of a greater evil than the Holocaust.