Holy Synergy is a Great Eastern Catholic Website that some time ago broke the news of the reception of certain local Orthodox churches into Full Communion with the Catholic Church.
https://holysynergy.wordpress.com/2017/07/11/breaking-news-the-orthodox-church-of-puerto-rico-enters-into-communion-with-the-catholic-church/ It promotes True Catholic Ecumenism of the Return. And learning the history of what Catholic Martyrs tragically suffered under atheistic Communism - and how, also tragically, but truly, Orthodox authorities were quite often complicit in that - should show us Roman Catholics (1) First, under no condition, to willingly break our own Communion with Rome, always being firmly united in mind and in spirit to the Pope and the Bishops appointed by him (2) Second, equally firmly, to oppose all those wrong ideas in ecumenist minimalism that seek a false union without the humble return of separated Christians to the Catholic Church. See:
https://holysynergy.wordpress.com/2016/05/27/false-ecumenism-in-the-east-a-betrayal-to-the-martyrs/
In the Catholic East, it is not uncommon to hear that we are the “Eastern Orthodox Church in communion with Rome” or “we are the voice of the Orthodox Church in communion with Rome.”
While it is true that we are the bridge between the Catholic Church and the many divided churches of the East in whom sadly happen to be in schism with Rome; and while it is also true that we are Orthodox (because of our profession of the Catholic Faith); it must be brought to our attention that there is a Catholic identity problem within the East just as there is within the West.
This is because there is a misconception of who we as Eastern Catholics are; whether we be Byzantine, Maronite, Coptic, Syro Malabar etc.
Among many beloved Eastern Catholics of good will, there happens to be an emotional attachment to the Eastern Orthodox Church because of its similarities in regards to theology and liturgical rites.
Having encountered many Eastern Catholics, it is not uncommon to hear that the Eastern Orthodox and the Oriental Orthodox Churches are equivalent to the Catholic Church because of the validity of the 7 sacraments, the veneration of saints etc.
Even though these separated churches have valid sacraments and many similarities with the Church, it must be remembered that they are separated for a reason – that is – because of their bitter rejection of the deposit of faith in regards to submission to Peter, the Pope.
“You cannot deny that you are aware that in the city of Rome the episcopal chair was given first to Peter; the chair in which Peter sat, the same who was head—that is why he is also called Cephas [‘Rock’]—of all the apostles; the one chair in which unity is maintained by all” (Optatus, The Schism of the Donatists 2:2 [A.D. 367]).
With that in mind, we here at HolySynergy must note that many Eastern Catholics have died at the hands of schismatics and communists because of this very key doctrine. Being that they are our ancestors as martyrs and saints of the church; insisting that the Orthodox are the same Church as the Catholic Church, or at least equivalent, is a slap in the face to these very saints ...
8. Pavel Peter Gojdič

Blessed Gohdič was a Basilian Monk and Bishop of the Greek Catholic Eparchy of Prešov, Slovakia. Because of his rejection to submit Greek Catholics to the Russian Orthodox Church, as insisted by the Communist party, he was tortured. Later, the Communists have given him the infamous offer that if he were to leave the church, they would appoint him the patriarch of the a Orthodox Church of Slovakia.
He piously rejected to loose communion with the Pope and to convert to the schismatic church, causing him to suffer even more persecution. He died of terminal cancer in the prison hospital of Leopoldov Prison in 1960, on his 72nd birthday. He was beatified on 4 November 2001 by Pope John Paul II.
Let us close this post with a few quotes from the Popes.
“…for the union of Christians can only be promoted by promoting the return to the one true Church of Christ of those who are separated from it, for in the past they have unhappily left it.” -Pope Pius XI, Encyclical “Mortalium Animos”
And under Pope Pius XII, the Holy Office issued this directive "Now in many parts of the world, as a result of various external events and changes of views on the part of people, but especially in consequence of the common prayers of-the faithful through the grace of the Holy Spirit, there has grown constantly in the minds of many persons separated from the Catholic Church the desire for a return to unity on the part of all who believe in the Lord Christ. To the children of the Church this is surely a cause of true and holy joy in the Lord, and at the same time an invitation to help all those who sincerely seek the truth, by earnest prayer to God imploring for them the grace of light and strength. However, some of the initiatives that have hitherto been taken by various individuals or groups, with the aim of reconciling dissident Christians to the Catholic Church, although inspired by the best of intentions, are not always based on right principles, or if they are, yet they are not free from special dangers, as experience too has already shown ... Since the above-mentioned "union" is a matter which pertains primarily to the authority and office of the Church, it should be attended to with special care by the Bishops, whom "the Holy Ghost hath placed to rule the Church of God."[2] They should, therefore, not only diligently and effectively watch over this entire activity, but also prudently promote and direct it, for the purpose of both helping those who seek the truth and the true Church, and protecting the faithful against the dangers which may easily flow from the activity of this "Movement." ... They shall also diligently provide whatever may be of service to non-Catholics who desire to know the Catholic faith; they shall designate persons and Offices to which these non-Catholics may go for consultation; and <a fortiori> they shall see to it that those who are already converted to the faith shall easily find means of more exact and deeper instruction in the Catholic faith, and of leading a more positively religious life, especially through appropriate meetings and group assemblies, through Spiritual Exercises and other works of piety ... It should be made clear to them that, in returning to the Church, they will lose nothing of that good which by the grace of God has hitherto been implanted in them, but that it will rather be supplemented and completed by their return. However, one should not speak of this in such a way that they will imagine that in returning to the Church they are bringing to it something substantial which it has hitherto lacked. It will be necessary to say these things clearly and openly, first because it is the truth that they themselves are seeking, and moreover because outside the truth no true union can ever be attained." This is how great Bishops like St. Augustine and St. Optatus reconciled Donatists to the Apostolic Throne of St. Peter and to the Catholic Church, after refuting their errors on re-baptism etc.
What are some of the ways in which the Church can better resolve the pastoral problem of false ecumenism going forward?