Blessed Pius XII and JPII total opposites? Thats an understatement. I wonder what the Chances were of seing Blessed Pius at a Vatican rock concert. Or wearing tie dyed vestments and watching a bunch of clowns perform. Then going and kissing a koran. Probably not much.
Both were human beings, creatures of God (who created only good) and only gnosgtics and manicheists, the beliveres of the dual (good and evil principle) deny this
Both were popes and possesses the binding and loosing power, and anyone who denies this is schismatic, not Catholic.
Pius XII as pope never left Italy, he never sat on supersonic jet plane, never used computers and so on.
Your harsh judgment about what John Paul II did, is very similar how the pharisee denounced Jesus, who thought it unthinkable that a honest Jew would let a prostitute to wash his feet.