Edit he’s not asking, he’s telling him. These radicals will talk all day about ecumenism, until it actually does something to unify Christians. They’d much rather divide Christians and keep them in Schism. There are a few characters in the Bible who were like that.
If anything, it looks like the Orthodox are growing closer to the Catholic Church, as the Patriarch of Constantinople suggested the plausibility that the Great Schism could be drawing to a close.