This is nothing new my friend, we see glimpses of this already happening in the church in Revelation 2 and 3. It’s something the church has always battled against in my opinion.
Respectfully, this discussion is in the context of Eastern Orthodoxy, and the Holy Orthodox Church has historically not had this problem. The issue of ecumenism in the Orthodox Church has been widely opposed, for example, by the members posting in this thread, for good reasons.
On that subject, I think the Church of Georgia under the leadership of His Holiness and Beatitude Catholicos Ilia II, who had previously been the co-President of the World Council of Churches, made the correct decision in leaving the World Council of Churches in 1997, given that the WCC has taken on an extremely liberal, ecumenist-syncretist stance, particularly its Faith and Order committee. My understanding is that the Orthodox churches which remain in the WCC do not participate in that committee, but that committee is nonetheless a part of the WCC, and has done some things with regards to worship concepts which are scandalous.
And speaking of scandals, I applaud that video for highlighting the dangerous syncretism of Pope Francis. Not only did he do that with a Muslim leader, but he and other bishops of the RCC apparently engaged in some indigenous non-Christian religious practices during the disastrous Amazonian synod. I think it would be completely appropriate for the Eastern Orthodox communion as a whole to suspend dialogue with the Roman Catholic church until Pope Francis resigns and a new Pope is elected who would explicitly repudiate the syncretic-ecumenist actions of Pope Francis and at the same time explicitly affirm the Holy Orthodox Church, and, I don’t know, maybe apologize for the uncanonical excommunication of the Ecumenical Patriarch of Constantinople in 1054, and his peers, such as the Patriarch of Antioch, who was declared excommunicate and anathema in 1078, and also for the coercive elements of the Council of Florence, and for the appropriation of portions of the Orthodox Church via the Union of Brest and the political apparatus of the Polish-Lithuanian Commonwealth, which resulted in the Carpatho-Rusyn Orthodox Christians being forcibly united with the Roman church until the 20th century, when St. Alexis Toth of Wilkes-Barre lead many Ruthenian Greek Catholics into the Russian Orthodox Church* and later, many others joined the American Carpatho-Rusyn Orthodox Diocese under the omophorion of the Ecumenical Patriarch, and of course, we now also have the autocephalous Church of the Czech Lands and Slovakia.
*I am curious, given the very high concentration of OCA, ROCOR and MP Patriarchal Diocese churches in the area around Wilkes-Barre Pennsylvania, I have been given the impression that the Rusyn converts following St. Alexis Toth wound up in the Metropolia, which became the Orthodox Church of America, but I would think, based on the timeline of events, that some would have wound up in ROCOR and in the Patriarchal parishes? If I am mistaken, and the Rusyns who are not in ACROD are overwhelmingly in the OCA, just as the OCA inherited the Russian Orthodox parishes in Alaska more or less completely, I also want to know that. I myself joined the OCA just under a decade ago, although I have also always been particularly fond of ROCOR (I love all of the Orthodox churches, but some of them I feel a special affinity for, based on various reasons including, for instance, their approach to church music, liturgics, and so on).