Yes they have, however never in a political atmosphere as we have to contemplate today.
Oh, for pete's sake!!! Did you ever hear of WWII??? The Warsaw Ghetto...St. Petersburg...Dresden...
I guess spaceships dropped off the folks who live in Chinatown and Little Italy.
Lord knows it couldn't possibly be political problems around the globe./
Okay, I amend my statement for crying out loud.
Add stateside to it! ; )