I’ve been waiting to post this, but I’d didn’t know how since it’s a bit controversial, but this thread gave me the opportunity to do so. It’s a recent debate between Eastern Orthodox and Oriental Orthodox:
The theology of Chalcedonian Eastern Orthodox and the Non Chalcedonian Oriental Orthodox isn’t really the same when you actually look at it in detail. From my own exprience from listening to Coptic and Syriac clergy, they want nothing to do with Roman Catholics, Protestants (especially Protestants), or Eastern Orthodox so long as they hold to Chalcedon. Likewise I doubt the Eastern Orthodox will want to give up Chalcedon or accept communion from those who reject what is viewed as an Ecumenical and infallible Council by the Eastern Orthodox Church. The Copts and other Non Chalcedonians haven’t been comprimsed on anything regarding Chalcedon for more than 1400 years, so I don’t expect them to do so now. Also from what I’ve read and listened to the Oriental Orthodox, more specifically the Copts still view Chalcedon as being Nestorian in a way, although they do accept it could be interpreted in an Orthodox manner, the fact that it could be read in a Nestorian manner (obviously not how the Eastern Orthodox read Chalcedon and the Tome of Leo) is enough reason in their belief to reject the Council of Chalcedon and Leo’s Tome. So I see very little chance of any sort of a reunion without one side comprising atleast. some core parts of their belief.