[Doug Loss]

It may not have been their opinion, but it is a historical fact. Just because the rest of Christendom tried to keep Rome from removing itself doesn’t mean they weren’t aware of the western efforts in that direction.

[Petrosius]

It may not have been their opinion, but it is a historical fact.

And which ecumenical council declared the teachings of Rome to be heretical? By your own ecclesiology until such an event all we can have is a theological dispute, not a rupture of the Church.