Asked by a group of Middle Easterners why they were a target of good-natured jokes, a popular Hispanic comedian recently said, "Because it's your turn." The hypersensitive political-correct crowd would have us believe that there is currently some kind of unprecedented assault on immigrants and immigration. But ours is a country of newcomers, none of whom were welcomed with open arms. The Irish, Jewish and Italians, for instance, were not cosseted as they might be today. They were subjected to mockery as well as employment and housing discrimination. Thankfully, none were so brittle, nor their...