One of the marks of tyranny is that what is presented as "truth" can change.
Everyone must believe whatever the tyrant proclaims from time to time, even if what is proclaimed contradicts with what was proclaimed previously.
Martin Luther was a typical example. He was not above self-contradiction. And when he was caught with his "hand in the cookie jar," he became furious, threw tantrums, and spewed out vitriolic "hate-speech" (by today's standards anyway) against those who would oppose him, even if they had thought he was their friend.
When Vatican II was in progress, the hackneyed refrain was continuously, Oh, don't worry about binding authority. This is not a dogmatic council. This is a PASTORAL council. Books have been written on all the times that message was shoveled out like piles of manure out of a barn.
Only, after the council was over, gradually did the "dogmatic" theme slowly grow. They first used the excuse of "in accord with the spirit of Vatican II," which gave a temporary window of opportunity to circuмvent traditionally-established norms of definition. Because there were no definitions in Vatican II. It was a NON-DEFINITVE COUNCIL. Nor are there any definitions since Vatican II that are binding on the faithful. We live in a non-definitive age.
This slowly creeping corruption is the work of evil, and therefore it was an unclean spirit, the unclean spirit of Vatican II at work all along.
Saint Paul called it the mystery of iniquity.