Which of the hijackers were Christians or Jews? BTW, bigoted is not the same, as racist but don't let that stop you.
None of the three muslims who make jokes in the coffee shop were hijackers either. Bigotry (including racist bigotry) should never acceptible in American (though it seems to be the norm here on Free Republic).
Besides if a waitress were giving me strange looks because I were wearing a headdress, I would be pissed off too. Thirty years ago I had just gotten off six years of active duty in Naval Aviation and one cold night I stopped for coffee in the south (wearing my leather flight jacket) and a bigoted waitress swore at me because I had a (light) beard. To the establishment's credit, a young waitress came over and apologized and poured me my coffee. That's what I mean when I say there are bigots everywhere and I see no reason to put up with them on the grounds it's okay to be a bigot if we do it for security.