You wrote:
“The kindest thing that can be said about Pope Pius XII, was that he was a mediocrity.”
Saving thousands of Jews is not mediocrity. Perhaps your life is mediocrity. Mine most certainly is compared to all the things Pius XII did. No one who knows anything about Pius XII can call him a mediocrity.
Certainly the Jews didn’t think Pius XII was a mediocrity: http://www.ewtn.com/library/ISSUES/PIUS12GS.HTM
Do you know what a mediocrity is? In terms of Popes, Pius XII was a mediocrity. That is not so bad as you might think.