Well, for one thing I think it is inaccurate to say that they still possess the same faith. So there’s that. There’s also the fact that your argument seems to be built on externalities that I have already explained in several places do not stand for the Orthodox faith
in toto (yes, the liturgy and the Creed and whatnot are all integral parts of Orthodoxy, but they are not its sum…they must be understood and lived in an Orthodox fashion as well, admitting no such innovations as those in union with Rome have embraced). I don’t really know what more you want me to say here.
From a Western mindset it is difficult to determine that one Orthodox church out of unity with Rome and those sister church’s professing the same creed, liturgy etc… who have come into union with Rome no-longer possess the Orthodox faith. One looking from the outside in would not see any difference.
Please permit me this example; In Orthodoxy each Church has it’s own bishop, In the Western Church we too have our own bishops. All of which are self governing just as in Orthodoxy, neither side has detered from this apostolic foundation. Orthodox has different rites pertaining to each ones community and apostolic succession. In the West we have only one rite, but is expressed in the vernacular of each nation, people and tongue.
When it comes to doctrinal issues, the Orthodox follow the councils and the patriarch overseeing the council in union with the council members. This is a huge subject because we have to begin with who calls a council etc.
When it came to doctrinal issues in the West; The bishop of Rome calls a council united with all the bishops in the west and from the East in union with the magesterium.
The subject matters that you relate to that came from these councils in the West, Orthodoxy rejects. First of all Orthodoxy did not attend because their emperors would not allow them to leave their sees, secondly these eastern emperors saw a problem if the Eastern and Western Church’s united. Secular powers played a role in part of the schism. Thirdly the East saw the problems in the West a Western Catholic problem not an Eastern problem and saw no need to engage. Here is my summary; The apostolic Catholic faith came underattack, the Popes and the magesterium defended and protected this apostolic faith against all secular powers, scientific communities and new false freedoms such as relativism, communism etc…
The conclusion is Rome and the magesterium never moved from the apostolic faith contrary to what Orthodox claims. She defended the apostolic faith in terms and understanding that layed these attackers to rest, never deviating from the apostolic faith. During these times the East may not have been affected by these attacks such as the protestant revolution, Darwinism and Athiest to begin the list. The gates of hell came against Peter (Popes) and the Church during these trial times but never prevailed.
What you claim the Popes and magesterium proclaimed as doctrine in terms in order to maintain the apostolic faith and fend off the attackers is not Orthodox. Had Orthodoxy played a role in defending these heresies in the west, we may have terminology that both can agree too today, but this did not happen. It goes without saying pride played a part in this chapter of history.
If and when the Orthodox Church’s come under similar powerful attacks and I pray that they don’t, the popes and the magesterium have set in stone to fend off such attacks. The doctrine has never changed it remains apostolic.
These expressions of the apostolic faith is expressed in terms for the western powers and societies to understand them. The Orthodox rejects our western expression of the apostolic faith which the Orthodox do not understand from their own expression of faith.
We in the West do not reject your expression of faith expressed in liturgy and doctrine so long it is never heretical. The point is The West and East have not counciled together to rule on such matters. Orthodox from it’s autocephalous stances have rejected our Western expression of faith to defeat these western heresies.
I generalized this to gain a perspective of what you reject today from the West is not your Orthodoxy, but when broken down from scripture, sacred Tradition and revelation from Jesus Christ himelf, supported by the Early Church Fathers, described in terms that the Orthodox can understand and interpret from Orthodoxy, you will find these doctrines are not new and invented, but defended and expressed to new languages, mindsets, newly founded nations in order to grasp them, that the content of these doctrines remain rock and preach the same Gospel of Jesus Christ.
I hope that Orthodoxy celebrates in her autocephalous stance and do not fall into fear of really looking at what took place in history and when the Popes and magesterium defended the apostolic faith, the world witnessed heavenly signs and wonders that followed these apostolic teachings and confirmed them.
Peace be with you