“It is to give proof of a submission which is far from sincere to set up some kind of opposition between one Pontiff and another. Those who, faced with two differing directives, reject the present one to hold to the past, are not giving proof of obedience to the authority which has the right and duty to guide them; and in some ways they resemble those who, on receiving a condemnation, would wish to appeal to a future council, or to a Pope who is better informed. On this point what must be remembered is that in the government of the Church, except for the essential duties imposed on all Pontiffs by their apostolic office, each of them can adopt the attitude which he judges best according to times and circumstances. Of this he alone is the judge.” (Pope Leo XIII, Apostolic Letter Epistola Tua, 1885)

Roman Catholic

And now a word from a Catholic Theologian and doctor.

I heard a priest say that "He (the Pope) functions as the Pope when right but doesn't function as the Pope when wrong."

Humane Vitae is infallible and part of the Magesterium, but you don't have to obey Amoris Laetitia according to the trad. Just reverse this for a liberal Roman Catholic.

Even Neo-Nazis have DEI requirements now.