In fact, John Paul II was rather unique in this regard, and much criticized from inside the Church for his rather undiscriminating behavior. But do not forget, these were not doctrinal statements but acts of a polite and very friendly to all man.
Sorry, but Pope John Paul II apostatized from the Catholic religion, and is currently in hell even by the feeble standards of the RCC. Observe:
Pope Pius XI, Mortalium Animos (# 2), Jan. 6, 1928: For which reason conventions, meetings and addresses are frequently arranged by these persons, at which a large number of listeners are present, and at which all without distinction are invited to join in the discussion, both infidels of every kind, and Christians, even those who have unhappily fallen away from Christ or who with obstinacy and pertinacity deny His divine nature and mission. Certainly such attempts can nowise be approved by Catholics, founded as they are on that false opinion which considers all religions to be more or less good and praiseworthy, since they all in different ways manifest and signify that sense which is inborn in us all, and by which we are led to the obedient acknowledgment of His rule. Not only are those who hold this opinion in error and deceived, but also in distorting the idea of true religion they reject it, and little by little, turn aside to naturalism and atheism, as it is called; from which it clearly follows that one who supports those who hold these theories and attempt to realize them, is altogether abandoning the divinely revealed religion.
Pope Pius XI, Mortalium Animos (# 10): So, Venerable Brethren, it is clear why this Apostolic See has never allowed its subjects to take part in the assemblies of nonCatholics
St. Thomas Aquinas, Summa Theologica, Pt. I-II, Q. 103, A. 4: All ceremonies are professions of faith, in which the interior worship of God consists. Now man can make profession of his inward faith, by deeds as well as by words: and in either profession, if he make a false declaration, he sins mortally.
St. Thomas Aquinas, Summa Thelogica, Pt. II-II, Q. 12, A. 1, Obj. 2: ...if anyone were to... worship at the tomb of Mahomet, he would be deemed an apostate.
Compare:
John Paul II, Address, May 22, 2002: Praise to you, followers of Islam Praise to you, Jewish people Praise especially to you, Orthodox Church
John Paul II, Redemptoris Missio (# 55), Dec. 7, 1990:
God
does not fail to make himself present in many ways, not only to individuals but also to entire peoples through their spiritual riches, of which their religions are the
main and essential expression
Nor is he alone, as you well know, considering all the Catholics on this forum who were defending the idea of “Atheists of good will” getting into heaven. You’re all the same, teaching the same things.