I tell you what, since you believe that our knowledge of the popes' sins qualifies us to declare him deprived of his office, or never to have been elected, YOU be the first one to get the whole papal deposition thing rolling.
Obviously you strongly believe that when Our Lord established His Church, He never foresaw any situation like this coming, which is the only possible explanation as to why His Church never established any procedure for declaring the pope a heretic, and on that account he is no longer pope and since he is no longer pope MUST be deposed!
Just do it, go ahead. It has never been done before so please, you blaze the trail! Think of it as just another innovation, only instead of saying it's a NO innovation, this one can be an innovation inspired from Cajetan and 135 other theologians - call in the "The Theologian's Law of Papal Deposition".
See all the help I am offering? - the rest is up to you.
This topic has been discussed before by many theologians and has foundations in the Canon Law, your claim that "it has never been done before" is unfounded. An imperfect council can certainly depose a heretic who already lost his papacy - it is not up to me to judge about the details, I'm not arguing about it. I argue about general rule that the heretical Pope can be deposed, which has overwhelming evidence, and against which you have your private misinterpretation of several Magisteral teachings taken out of context.
A while ago Remnant provided a very good survey of teachings on this subject
http://remnantnewspaper.com/web/index.php/articles/item/1284-can-the-church-depose-an-heretical-popeAs you see, even in R&R camp nobody supports your position, because nobody privately misinterprets Magisterial teachings than you do.
"A non-Christian cannot in any way be Pope, as Cajetan affirms in the same book, and the reason is because he cannot be the head of that which he is not a member, and he is not a member of the Church who is not a Christian. But a manifest heretic is not a Christian" (St. Robert Bellarmine, De Romano Pontifice)
The Council of Constance CONDEMNED AS ERROR: "If the pope is wicked, and especially if he is foreknown to damnation, then he is a devil like Judas the apostle, a thief and a son of perdition and is not the head of the holy church militant since he is not even a member of it."
Why, tell me, why do you listen to Cajetan when 25 years AFTER he already died, the Council of Constance infallibly corrected him? The council infallibly condemns as error the exact thing you claim is a teaching of the Church.
Why do you pit a theologian's teaching against the infallible teaching of a Council? This is exactly what McTheology does.
Now you have a mission - be the first to get the procedures established for "The Theologian's Law of Papal Deposition" and follow through on it. This should keep you busy for less than an hour. Once you figure it out, you will drop the whole thing as error - otherwise, you will have proved yet again that you wholly reject what the Church teaches as regards what our responsibility is in regards to a heretical pope.
Looks like you don't even read what I wrote - the quote I gave you was from St. Robert Bellarmine who wrote over 100 years after Constance, not from Cajetan. You really think he was unaware of this teaching?
Tha truth is that Constance did not correct the teaching that heretical Pope can be deposed,
because it did not even address this subject. It says about sinful, wicked not heretical Pope - you completely misinterpret and misapply Constance, it does not deal with the question of heretical Pope. Constance condemns those who would ay that the Pope lost his office due to sins such as wickedness, theft etc. This is different than sin of heresy, which separates from the Church.
You gave no answer to Pope Leo XIII teaching:
"In this wise, all cause for doubting being removed,
can it be lawful for anyone to reject any one of those truths without by the very fact falling into heresy?-without separating himself from the Church?-without repudiating in one sweeping act the whole of Christian teaching? For such is the nature of faith that nothing can be more absurd than to accept some things and reject others."
Formal heretic separates himself from the Church, whether he is the Pope or not - thus he can be deposed, as St. Robert Bellarmine teaches 100 years after Constance which you keep misinterpreting.
So, I'm certainly going with Bellarmine and Magisterium over your private misinterpretation of Constance.