I am not sure what your point is, but mine is simply this:
If you look at the locus of union in Europe, it is - as one might expect - at the interface of regions of Western and Eastern Christian populations, and often in regions with heavily mixed populations. There were plenty of opportunities for cultural contact between Eastern and Western Christians, opportunities for picking up ideas and practices from each other, etc.
The fact is, the homelands of the Ruthenians south of the Carpathians, as well as the Red Ruthenians and White Ruthenians were not projecting into the west. Sorry, but you made that up.
The political power of the Hungarian kingdom and the Polish kingdom was projecting into the east. Funny that the Latins who migrated eastward did not pick up a few things too, like Palamite theology, or an understanding of Theosis, or devotional practices like the Akathist and the Jesus Prayer, or Orthros before Mass.
No, this cultural interchange was one-way. It was the eastern church that suffered the damage.
All churches are different, of course, but in the case of my own Ruthenian church, this opportunity for contact was especially substantial as, we were projecting along the Carpathian ridge into territories that were substantially Western Catholic - Poles, Hungarians, Slovaks. Even in the more eastern regions of the union, those looking for an education would necessarily be finding their way west.
Actually, these lands (Poles, Hungarians, Slovaks) were originally evangelized into the eastern church through the work of Cyril and Methodius (co-Patrons of Europe along with Saint Benedict, according to Pope John Paul II). That effort was undone even before the great schism Southern Poland practiced the “Methodian Rite” until the eleventh century. After the Magyars accepted Christianity from the west, the native eastern rite christians were by and large pushed into the Latin church.
So your suggestions about people knowing nothing about Western ideas cannot be so casually asserted.
Frankly, they could have known as much about Islam, or even Buddhism, but that is not the same as actually being taught it as truth by the village priest.
Now don’t go off on a tangent here, I am not equating Islam and Latin theology. The point is, eastern Christians might have heard of western theological ideas, but they did not believe them, they believe the theology expressed in their liturgy and preached by their priest.
In fact, if you look at Orthodox thinking of that time and region, you would have to accept the fact that if people were formally catechized (e.g. from St Peter Mohila’s Orthodox catechism) they would probably have strongly westernized ideas of original sin, purgatory, etc. This was after all the time (and place) of the so-called Western captivity.
Peter Mohila came after the Union of Brest and the Latin missionaries having worked in K’yiv, not before, and he had nothing to do with your Carpathian predecessors.
His catechism was corrected later.
Michael