4. I believe, and publicly teach, that the Catholic Church has always infallibly taught that because heretics are not members of the Catholic Church, they cannot validly hold office in the Church, according to divine law, and that, should they seem to hold such offices, the believing Catholic must conclude that their election to and possession of such offices is null and void. This would include, not only the manifest heretics John XXIII, Paul VI, John Paul I, and John Paul II, but also the manifest heretic and present illicit and invalid occupant of the See of Peter, Benedict XVI, who has the further handicap (unlike his immediate four predecessors) of not even having been validly consecrated a bishop, which, in addition to all other considerations, makes it impossible for him to therefore function as Bishop of Rome.
There are some things that Mr. Matatics agree with the Protestants, the papacy is the seat of the anti-Christ so says their confessions of faith. Heretics are called like that in the NT (see Epistles of John - 1,2,3 John).
It appears that what has been happening with Mr. Matatics is a form of disillusionment, and who knows, he maybe just touring Rome on the way back to Westminster.