The Orthodox you speak of is new, she does not come from anitquity as does the Eastern Orthodox and Roman Catholic Church, because these remain in unity as one body (magisterium) of faith in communion with the Pope with Jesus Christ our head
This makes no sense. The Eastern Churches in communion with you (with the exception of the Italo-Greeks and maybe the Maronites, though the latter’s claims of always having been in communion with Rome are historically dubious) have
returned to communion with Rome at some point. They haven’t simply remained in unbroken communion.
The Orthodox can legitimately claim to have simply remained where they always were. True, they aren’t in communion with you, but they would say that this is a change on your part, not theirs. You excommunicated them for not kowtowing to Rome.
whereby these new Orthodox come over a thousand years later to protest the Pope’s authority, when all the other Eastern Orthodox Churches (Rites) from antiquity remained in communion with the Pope.
You choose to regard communion with the Pope as the decisive question, and in yet another petitio principii you make this assumption part of your argument, when in fact the question is precisely whether the churches not in communion with Rome have the same historical continuity you do.
I understand the argument that the Eastern Churches changed their attitude toward Rome, moving toward a weaker view of papal primacy than they had held. And maybe there was some change–it’s hard to tell, because Catholic apologists rely on flowery passages of praise for orthodox Popes as proof that the Eastern Church regarded communion with Rome as essential. The Orthodox would say that this was always conditional on the continuing Orthodoxy of the Popes and never implied that the Popes get to define what is orthodox without any possibility that they might fall into error. This is at least a historically plausible claim. From an outsider’s perspective, there’s no clear way to say that the East has lost historical continuity, in the way that any fair-minded outsider can say that the Protestants broke dramatically with many aspects of medieval Catholic faith and practice.
When one makes such remarks as you do here, one tend’s to forget that the Roman Catholic Church is Orthodox because she has protected the Apostolic teachings intact
Petitio principii again. It’s not obvious to either Orthodox or Anglicans that your doctrine of indulgences (to refer to another recent thread) protects the Apostolic teachings intact, or that Vatican I’s claim that the Pope is infallible part from the consent of the Church protects the Apostolic teachings intact.
Catholic apologists are fond of appealing to Rome’s role in the first millennium (and even this is often exaggerated and over-generalized–Chalcedon owed a great deal to Rome; 2 Constantinople nothing as far as I can see) to justify anything Rome may have chosen to do in the second millennium. It doesn’t work like that. You can’t just coast on the strength of ancient glories.
by defeating here enemies including Eastern Orthodox heretics and heresies (oh yes, you probably didn’t know this)
Of course I knew that there were many Eastern heresies. By definition they were not Orthodox!
from the first centuries on ward. The Roman Catholic Church has defended the Apostolic teachings and Traditions since the resurrection unchanged
But that’s obviously false. It’s not clear to me that it’s true even of the Orthodox. But it is certainly not true of your Communion. That’s why Newman had to come up with his “doctrine of development.”
It seems pretty clear to me, as a church historian, that all churches have undergone change. Whether the change was valid development or invalid “corruption” can be debated.
And yes, this is very relevant to the OP, because the fact of change in all churches makes the assumption of the OP unworkable.
Edwin