The Onion, the joke newspaper, has an online video discussing the Ugly American. In "Has Obama Failed To Reduce Hostility Toward Obnoxious Americans Abroad?" pundits debate why American tourists are still viewed negatively around the world.
Behind the joke is the true phenomenon of the Ugly American. Besides brief experimentation by Nazi Germany, the United States was the first country where the "less cultured and mannered" middle and working classes could afford to travel aboard. It was therefore Americans who broke the "learned, polite traveler" stereotype.
Nowadays the Ugly Tourist is international. In Guanajuato, Mexico, for instance, I met an army of "Ugly Germans." Meanwhile, "Ugly Saudis" are well known in Bahrain and Monaco.