The POPE is considered God's reperasentative on Earth. To Catholics, he is infallible.
As an example, two years ago, the Pope declared that, contrary to hundreds of years of doctrine, babies who die un-baptised are admitted into heaven (previously it was held that their souls spent eternity in limbo). Once the Pope had declared this as doctrine, it became so. And presumably, all the souls of previously deceased babies in limbo were admitted into heaven. "POOF", just like that(!)
Re-writing history comes easilly to a Pope who was an active member of the Hitler Youth, one suspects......