Mark Judge makes an argument for a certain kind of public discourse, and, then, summarizes John Cornwall's book:
In 2004 Hitler's Pope author John Cornwall himself admitted he had been wrong. "I would now argue," he said, "in the light of the debates and evidence following Hitler's Pope, that Pius XII had so little scope of action that it is impossible to judge the motives for his silence during the war."
In other words, Hitler's Pope uses truths, half truths and lies; omits information selectively; simplifies complex issues and ideas; plays on emotions; advertises a cause (the iniquity of the Catholic Church), attacks opponents (ditto) and targets desired audiences.
It is, in short, a prime piece of propaganda. And the way to fight propaganda is to slowly, calmly, day in and day out, itemize the errors, omissions, and outright lies of the side telling the lies. The Catholic Church needs a smart and centralized website to do just that.
For what it's worth, here is my review of the book on the Amazon site, which attempts to do that.
Well, I don't know about the "calmly" part.