So you figure that the second conclave of 1978 really missed the boat and elected Saint John Paul II when it could have elected grumpy Marcel. Marcel would have told that rotten world off---all grump all the time! By the end of a Marcel papacy of thirteen years, we might have had ten or twelve Catholics left. First Marcel would have banished the Novus Ordo types and those who would refuse to take an oath that each and every word of each and every document of Vatican II was vile and abominable heresy. Since Leo XIII's Rerum Novarum betrayed a certain sympathy for labor unions, Pope Marcel, child of a manufacturer, would have made the damnable peasants scurry back to their low paid places lest they risk of excommunication.
I could go on but you get the idea. Eventually as dementia proceeded and his outsized sense of self-importance assumed ever more titanic proportions, Marcel would have found suspect passages in Pascendi Domenici Gregis or Lamentabile Sane and retroactively excommunicated Saint Pius X himself. Whereupon, an even Higher Authority might well have reached down and physically excommunicated Marcel, removing him from the Church Militant on Earth, never to be admitted to the Church Suffering much less the Church Triumphant, and making him yet another proof of what St. John Chrysostom said about the paving of the floor of hell. Perhaps, though, God would have been merciful to Marcel in his sad state of irrationality.
As to John Vennari's Catholic Family News and, for good measure, the dissident wing of the Matt family's The Remnant, I am sorry that they are persistent malcontents but the Roman Catholic Church is the Roman Catholic Church. If they have all these problems with the Roman Catholic Church, they should find another or found another more to their liking. Marcel did.
Neither John Vennari nor the SSPX has anything to do with a Pope who invoked a Saint to protect Islam.
What does define JP II' s papacy? Was it it his material heresy? If you had bothered to read the article, you would have read this:
Hear our prayers for the intention of the Jewish people, which you continue to cherish according to the Patriarchs.
Be mindful of the new generation, the young and the children: may they persevere in fidelity to You, in what is the exceptional mystery of their vocation. JP II