says the Athanasian Creed, "that we worship one God in Trinity and Trinity in Unity, neither confusing the persons nor dividing the substance."
The Athanasian Creed does not say that the catholic faith is that we submit to the Pope as Christ's vicar on earth; that we recognize the infallibility of the Bishop of Rome when he speaks ex cathedra, or any such thing. It says the catholic faith is that we WORSHIP the Blessed Trinity without dividing the Divine Unity.
"That's too catholic" can only be greeted with "I sure hope so!" You can't be "too" worshipping of the Trinity in Unity and Unity in Trinity, can you???