What is challenging for anyone with some historical and theological background is the Filioque clause in the creed and how that led to the great schism with the Orthodox church which in turn led to the Reformation.—Robert Helfman

The Filioque clause is about the same Blessed Trinity that Richard Rohr finds interesting in communal interactions.  The difference is between the Persons of the Trinity among themselves and between themselves and humanity.  Using that to connect the Orthodox with Protestants escapes me.  Protestants were not  Arians.

So, the problem is reformulating an accepted conception of God as judgmental with a new less-judgmental conception of God.  How that challenges Jansenism is no problem, but challenging Arianism escapes me.