It conjures up the alarm bells that Benjamin Franklin set off about German immigrants in the late 18th century, who he insisted could never adopt the culture of the English, but would "swarm into our Settlements, and by herding together establish their Language and Manners to the Exclusion of ours." It popped up in the mid-19th century amid worries that Chinese immigrants were "unassimilable," which led to Congress approving the explicitly-named Chinese Exclusion Act of 1882. And it helped welcome the 20th century when Massachusetts Sen. Henry Cabot Lodge warned that immigrants (read: the Irish) were diluting "the quality of (U.S.) citizenship" and others complained that Italian immigrants were uneducated, low skilled, apt to send all their money to their home country and prone to criminal activity. Where have we heard that before? And when will we hear it again? After all, Hispanics may be the latest group to find themselves in a culture war with nativists. But they won't be the last.