Yes. We have to distinguish these things. To speak ill about the pope is one thing, and advising him correctly publicly due to his doctrinal errors is another thing. I agree that we should not speak about the personal limitations of his character even if we know he has not been behaving properly in his character – these are his private and personal limitations and we should not speak about them.
However, when the pope is publicly confusing people with the doctrine or is allowing sin, we have to respectfully admonish and correct him. This is not bad, this is good because correction is an act of love for our neighbor. We have an example in the Holy Scripture when the Apostle Paul publicly admonished and corrected Peter in Antioch, it was not a bad speech about the Pope but it was a public correction due to his love for Peter and the entire church so that the error of Peter in Antioch will not spread in the Church. We can apply the same principle in the present.
I repeat, we must always conserve to maintain the supernatural view of the Papacy even after the most bad Pope, which could be. He is still the Pope, we have to respect him as Jesus Christ also respected the High Priests in the Old Testament during His life. In all of St. Paul's experiences, when he was in a tribunal and the High Priests were accusing him and speaking falsely in front of the government, St. Paul stood for himself against this Jew who was accusing him. After realizing he was addressing a High Priest, St. Paul asked for pardon, acknowledging that if he had known, he wouldn't have approached the situation in such a manner.
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