Gee, I hate to sound like a broken record, but everything you've written doesn't explain why Roman Catholic theologians, in discussions with Orthodox theologians, which had the authorization to carry on those discussions from the Pope, felt compelled to recommend lifting the condemnation of Lyons II just two years ago.
By the way, unlike FormerLib who only knows "some" Byzantine Rite Catholics who deny the filioque, every single one I know denies it.
Since I was talking about the creed, and the theologians you cite were talking about Lyons II, I don't see how it's relevant. Lyons II was talking about beliefs, not the creed. The creed is an expression of some of our beliefs, but not of all of them.
The articles of the Union of Brest were all approved by Pope Clement VIII in 1595, including art. 1:
Since there is a quarrel between the Romans and Greeks about the procession of the Holy Spirit, which greatly impede unity really for no other reason than that we do not wish to understand one another—we ask that we should not be compelled to any other creed but that we should remain with that which was handed down to us in the Holy Scriptures, in the Gospel, and in the writings of the holy Greek Doctors, that is, that the Holy Spirit proceeds, not from two sources and not by a double procession, but from one origin, from the Father through the Son.
Seems +BXIV disagrees with gbcdoj.
How does he disagree with me? Please see post #17.
I don't see how it's relevant that all the Byzantine Rite Catholics you know happen to reject this Catholic dogma. Where does the Church approve this? The Solemn Profession of Paul VI, given on June 30, 1968 as "a firm witness to the divine Truth entrusted to the Church to be announced to all nations", states:
We believe then in the Father who eternally begets the Son, in the Son, the Word of God, who is eternally begotten; in the Holy Spirit, the uncreated Person who proceeds from the Father and the Son as their eternal love.