Americans used to hate the Irish, Italian, and other European immigrants. Now we like them, and now we hate the Latino immigrants. That's a touchy subject though.
@Weird Europe: I'd say I've seen weirder, but I'm pretty sure we've all seen an Islamic Europe at some point on a 3000 BC start.
US still dislikes Catholics which is ironic because Squanto was Catholic and saved the Pilgrims (who later tortured and murder any Catholics they found)