Group A will say, “Group B teaches X, and we cannot accept X because X is heresy.”
Group B responds, “We have never taught X, but we teach Y, and Y is not heresy.”
The problem I see with the approach of certain people here is that despite Group B’s statements - with proofs - that “We teach Y, not X,” Group A keeps insisting that Group B teaches X.
Unless Group A can demonstrate that Y is heresy, then Group A has no grounds to reject unity with Group B. The problem is that there are those in Group A who will not even bother to address Y, but are content with their misconception that Group B teaches X.
This is quite a nice misconception of yours.
It should read like this:
Group A says: “We believe X, Group B believess Y, and we cannot accept Y because Y contradicts X and is a heresy.”
Group B says: “We have never believed Y, but we believe Z, which is not different from yours X.”
Group A: “Really? But in Lyons you clearly professed that Z is actually Y+n1; hence, it’s heretical because it contains Y that contradicts our X”.
Group B: “Oh, you don’t understand. We have further explained it in Ferrara-Florence that we did say in Lyons that Z is actually Y+n1, but what we actually meant is that Z is actually Y+n2!”
Group A: “We have already said that we don’t accept it, because Y contradicts our teaching X and is thus heretical.”
Group B: “You don’t understand. We don’t have a word for X, thus wee need to use the word Y when we mean Z which is the same as your X.”
Group A: “Well, as long as Z doesn’t include the meaning of Y+n1, or Y+n2, or Y+nx, it could be fine. Does Z exclude the meaning of Y+n1/Y+n2/Y+nn?”
Group B: “Well, No.”
Group A: “But Y a heresy!”
Group B: “You don’t understand. It’s not, because we mean if Z is Y+n1/Y+n2/Y+nn, then Y+n1/Y+n2/Y+nn are not heresises but legitimate differencies.”
Group A: “Every Y is a heresy”
Group B: “You don’t understand. Y+n1/Y+n2/Y+nn are not the same as Y!”
Group A: “Fine. Condemn Y as heresy!”
Group B: “You don’t understand…”
Continued
ad infinitum.