Like every Roman Pontiff, Pope Francis is not personally infallible; his opinions and non-infallible teachings do not have the guarantee of infallibility; he can err in a number of different ways. Therefore, the faithful can disagree, without sin. In so far as he can err, they can disagree. But faithful disagreement has limits.
The current situation is reprehensible. A large number of conservative Catholics, who formerly defended each Pope and their teachings, now see the current Pontiff as their theological opponent. They criticize everything he says and does. They interpret his words and deeds with suspicion and disesteem, rather than charity and faith. They are making many mistakes. Here is my summary of their errors:
1. They assume that the majority opinion in the conservative Catholic subculture cannot err.
2. They assume that the correct answer to any theological question is the conservative answer.
3. They think that conservatives are necessarily orthodox and faithful.
4. They each think themselves to be more faithful to Church teaching than Pope Francis.
5. Pride, sinful pride. For they will not humble themselves to be taught and corrected by the Roman Pontiff.
6. They interpret his every word and deed with a strongly negative bias.
7. They view Pope Francis as an opponent, not as their Pastor and Teacher.
8. They wrongly think that a Pope can possibly teach or commit heresy.
9. They oversimplify and distort Church teaching, without realizing it.
10. They do not admit that their own understanding of Church teaching might be in error.
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