I Got it!

While the Greek Orthodox Church and the Catholic Church are improving their relationships,these guys could have summit meetings with the SSPX, where they could all wallow in the trough of bitterness together.

Sung, together, in disharmony, with an irritable dinosaur:

You hate me.
I hate you.
But not as Much
As We Hate Together
Our Respective
Bishops, Patriarchs, and Hierarchies!
We really are a bunch of Protties!

Remember, boys, use your imagination! Oh, I see Pulvermacher already has that covered.

Then, after an unpleasant dinner of potatoes, they could play "pin the anathma on the cleric," that always fun game of resentment and nastiness.