Actually, no, they can't overrule it. The decree specifically says that it condemns any intiatives taken and declared it abolished in fact, and they ordained that in the future no one shall venture to write or publish books or booklets that in any way whatsoever promote erroneous initiatives of this sort.

Secondly, I thought that this would be easy for people to understand and draw the connection, since it's quite a simple letter. (This is how the Pre-Vatican II Popes wrote) with clarity and easy to understand language since they weren't attempting to obfuscate every single principle.

I mean, it shouldn't be difficult for an alleged Catholic to understand what I'm talking about. I know it must be unbelievable for you, as a Vatican II member, to know that these men existed. Popes who went out of their way to unambiguously condemn initiatives and movements contradictory to Catholicism.

Another interesting fact, is how you're attempting to do what many Vatican II theologians do when "protecting" the Popes from public lashback, is provide a seemingly orthodox explanation to an otherwise obscure text, which sometimes entertains three or four deviant meanings. The clear behaviour of 5th columns.