It’s not the implication that the Irish wouldn’t have had an understanding of the Trinity, seeing as how we worshipped triune goddesses like the Morrigu for thousands of years.
It’s not the use of the Padraig legendarium as a teaching tool for the various schisms that plague Chistianity.
It’s those accents. My voice is akin to honey poured over thunder, not the growling of a cement mixture.