I find it odd that an Orthodox who does not believe in purgatory, indulgences, papal universal jurisdiction or papal Infallibility is welcome to receive communion in the RC church, while a Roman Catholic who does not believe those things is excommunicated from the same church.
The Catholic hierarchy does not consider the Orthodox position on these matters contradictory to the doctrines themselves - just to the western/Latin expressions and traditions on them (the exception - to
some degree only - is universal papal jurisdiction, though properly and collegially understood even this difficulty begins to dissipate irrevocably).
The Catholic Church has never been and never will be under the impression that any one particular explanation or expression of revealed truths and sacred mysteries is exhaustive, including and especially the western/Latin one.
For instance, you can claim that you reject “purgatory.” Okay, but when a Catholic discovers that you pray for the dead, he or she no longer perceives any contradiction between our theologies -
differences? Sure. Of course! But
incompatibility in either direction? No.
Ultimately, Hesychios, this disagreement constitutes perhaps the only substantive one between our churches: whether our traditions, structures, theology, and ecclesiology are even incompatible at all.
As I’m sure you know by now, the Catholic position - regardless of the Orthodox one - is that these things are
not incompatible. After reading what
Marduk, a member of the Coptic Catholic Church, has said about
many things on this forum (including the filioque in this very thread),
I am more convinced than ever of the compatibility between western expressions of theological and ecclesiological matters and eastern - even eastern Orthodox - ones.
At the same time, I respectfully acknowledge without reservation that this opinion itself constitutes a disagreement with your position.
But the bottom line is this: because the Catholic Church considers your church to be apostolic and to have always successfully retained apostolic succession, to possess a valid hierarchy and even ecclesiology and to be a legitimate church in the full sense of the word (unlike the Protestant communities), to have retained the Sacraments and authentic Christian truth… in short, to justify its label of “Orthodox Christianity”…
Because of that, yes, the Catholic Church would have no problem with an Orthodox believer receiving Holy Communion at any Mass or Liturgy. I respectfully acknowledge, however, the consistency and integrity of the Orthodox position on the matter.