They have murdered and raped Yidden for the last 2,000 years which include the crusades, the inquisition, in pogroms and the Holocaust.
And the Chutzpa! When the Vatican allows Jews the privilege of publishing a stolen manuscript, it is on condition that we thank and acknowledge the Vatican library for their kindness and generosity; it must be printed on the cover page of every sefer published from a Vatican manuscript.
So the Chief Rabbis should have ordered the pope to return all that were stolen from us.
Otherwise, it is indeed a Chillul Hashem.