I know many people who will eat only at kosher mehadrin (very stringent kosher) establishments that employ only Jewish workers as food handlers. Several years ago on a visit to Israel, I was warned never to eat at a place that employed Arab food handlers, "because they will p!$$ and c%@p in the food." But of course, any liberal will tell you the people giving this advice were all "vile, fanatical racists."
That would seem to be noting more than common sense, two words not in the liberal lexicon.