Thanks for posting that. I'm just curious as to at what point God has suspended the free will of the Pontiff in order to prevent him from being in error.
As far as the second quote you gave from Bellarmine. That is a very temporal statement he refers to with his reference to Lutherans.
Today's circumstances are quite different from then.
By God's permission the majority of bishops and prelates can credulously be seduced by their pastors and then pass it along to the credulous masses.
Yet the principle still applies. Even the more learned sedevacantists (eg the www.traditionalmass.org types) make egregious errors in their explanation of the Pontiff's purported "heresies".
Worse yet are www.novusordowatch.org and other such persons. The latest I saw on NOW was that B-16 was a heretic for his proposal that the Lutherans could be restored to the Church by means of suitable adding to the Augsburg Confession, sort of a completion of all the Catholic elements that were missing. Left unmentioned in the denunciation of his 'heresy' (and I'm sure Ratzinger discussed this in the preceding pages), is that this idea has been floating around among Catholic churchmen since the 16th century.