Well we know the Messiah was born in Bethlehem, so he’s not Irish. King David however was of “ruddy” complexion, so perhaps the recessive gene was passed to the Irish through that line.
Plus there's going to be the inevitable conflation between the details of his first and second advent.
After all, Elijah the Tishbite went up into heaven in a whirlwind without seeing death, then returned as a new baby named John. Who saw that one coming?
Jesus certainly appealed to the non-conformists when he said,
"And if ye will receive [it], this is Elias, which was for to come."