When the country is so fscked that the anonymous Bubba presents a real issue, then why worry? It's done for. But, if I can readily and certainly identify someone who might be a danger by his citizenship and ethnic group, why should I not use the information? Anyone who is a citizen of Saudi Arabia and who wants to board a US jetliner should be all but turned inside out before hand. I'd even restrict their flight options to a few routes at specific times. I'd make no attempt to accomodate them or make them feel good. The message should be - you're from a place that we just can't trust - live with it or go home and make it trustworthy.
"To all our Semitic customers: We're sorry for the inconvenience - why not go home, clean up your millenium-old disputes, act like civilized adults, and then we can dispense with this unpleasantness? Whaddya say?"
(def Semites: A member of a group of Semitic-speaking peoples of the Near East and northern Africa, including the Arabs, Arameans, Babylonians, Carthaginians, Ethiopians, Hebrews, and Phoenicians.)