Let us say that my brother is married to a woman from Yemen. Let us say that they are good people (whatever you think that means). Let us say that she and my brother have become estranged, but share custody of their children. Let us say that they are good parents. Let us say that their son learned Latin at Boston College, their daughter Arabic at the University of Maryland. Let us say my sister-in-law once worked as an actuary for the I.R.S.