"technically African American, but it was by way of Ireland, and that showed a lot from the thick, nearly straight hair to the pale gray-blue eyes"

Wait, wait, wait. The way this is phrased implies Anita knows Vivian's ancestry includes Ireland just by looking at her- how the hell does she do that? Couldn't she be part British? Australian? Canadian? Russian? New Zealand-ian? Did LKH hear the term "Black Irish" somewhere and misunderstand?
I can never tell whether I'm more confused or horrified by LKH's bizarre racist and sexist worldview :/