a non-Christian, like a Unitarian, who does not believe in the Trinity and Christ's divinity, debating with Christians on minutae of Christian dogma is arrogant, stupid and ignorant.
The Unitarian (a non-Christian) who does that, kind of looks like
the arrogance of ignorance at work. You, being a Unitarian (and Unitarians deny the Trinity) have no idea what The Church believes nor disbelieves.