I should like to thank @rhemes for his commet and precision re the intent of Verrechio, namely: "Is Mortalium Animos still the faith of the Holy Catholic Church?". My previous comment seeks to go beyond this question, while affirming it as very important. Reading Pius XI's Encyclical and just comparing it with the transcript of Pope Francis' communication to the Ark Community, I conclude that prima facie the words of Pope Francis have abrogated the rationally presented teachings of Pius XI on the nature of the "unity" of the Church. Pius XI placed emphasis upon truth as a prerequite for unity and Pope Francis place full emphasis upon unity, down plays differences (of truths) and asserts that anyone placing "focus on our differences" is "sinning against Christ". That is a radical (to the roots of faith) statement. I am forced to conclude that Gloria.tv, you yourself, myself and all who concern themselves with the "differences" qua their truth content are sinners. "The desire for unity", Pp Francis' own words, is the essential value that triumphs over the truths of the faith (called slyly "differences") and turns all who do not "desire unity", rather focus upon the truths that differentiate, into sinners, yes, into SINNERS!!!!!!!!!! And what is the facit here? Francis I has de facto contradicted the teachings of Pius XI and designated him to be effectively a sinner because of his focus on the differences of truth. That is heady stuff!!! (Space here does not allow me to touch upon the reason for the Pope's reasoning as it is refleted in the video of "Archbishop" Palermo -- who falsely undersands Luther's faith.)

Now a further question (and one that my obligation to truth demands):
If Pope Y contradicts Pope X on a significant teaching of faith (e.g., the nature of the unity of the Church), what should one think about the age-old claims of the Church regarding the Magisterium? It would seem that contradictions in understanding the faith are now part of the the teaching assignments of the Magisterium. The acceptance of mutually exclusive teaching could be conceived as a factual refuation of the "traditional" concept of the Magisterium or, simply put, Cathoicism blows itself up. In this context ideas such as material and/or formal heresy pop up in order to save the infallible nature of the Magisterium. Perhaps Catholics could borrow a notion from Islam, i.e., "abbrogation". If two parts of the Koran contradict eachother, the later teaching "abrogates" the early teaching. How is that for a way out?

Final note: In his comments the Pope, directing himself to the Ark Community, speaks of "our shared baptism" and treats such a "shared" fact as sufficent for, I guess, "the Father, the Son and the Holy Ghost", viz., communion between Christians of any type. Pope Francis inadvertently evinces the faulty nature of his thinking. For "traditional" Catholicism baptism is the manner whereby the baptized enters into the sacramental reality of the Church as the Body of Christ. Catholics baptize infants (who cannot chose one way or another) into the real sacramental nature of Christ's Body. Protestant Baptists, on the other hand, reject the sacramental nature of unity of the Church. Instead, a sufficiently adult person consciously choses to accept Christ as his savior and then consciously allows him/herself to be baptized as a symbolic manifestation of said acceptance. For this reason, Baptists (who respect the truth of their faith) rightly reject Catholic baptism as a falsification of Christ's intentions. So, I have just focused up the differences of faith regarding baptism. In the end, since reason unto truth has been papallly sidelined, Pope Francis states nothing more than verbalisms, verbalisms and verbalisms -- And I have just sinned against Christ, in Francians terms, because I have just pointed out a difference. I do not take such condemnations by the current Pope in a friendly manner. The man has condemned me to hell as a sinner because I do not agree with his verbalisms and wish to focus upon differences, all in the name of TRUTH!