There were no (serious) cries for the internment of German-Americans during World War I, or Italian-Americans during WWII, or Russian-Americans during the Cold War. We don't even want to lock up the Franco-Americans now, because they make such great Spaghetti-O's.
No, we save suggestions of mass detention for the dark people. And thanks to the DC snipers and this latest fragging incident (funny how fragging was almost commonplace in Vietnam, but there was no suggestion of locking up all white guys just because it was mostly whites who did it), the wingnuts have a new reason to hate blacks AND Muslims. Like they really needed one.