Texas-Mexican restaurant owners considered it an insult.
By a strange twist of fate, the insult launched a success.
Coe American Food: The Gastronomic Story, Evan Jones [chapter III "Padres and Conquistadores"] Cuisines of Mexico, Diana Kennedy Encyclopedia of American Food and Drink, John F.
Mariani [separate entries for specific foods--fajita, tamale, chalupa...] Food Culture in Mexico, Long-Solis& Vargas The History of Food, Maguelonne Toussaint-Samat, "The History of Cereals, Maize in the West" (pages 164-176) New Mexico Cooking: Southwestern Flavors of the Past and Present, Clyde Casey Oxford Companion to Food, Alan Davidson [Mexico] Oxford Encyclopedia of Food and Drink in America, Andrew J. Pilcher The Story of Corn, Betty Fussell You Eat What You Are, Thelma-Barer-Stein ("Mexico") The history of bunuelos and churros can be traced to ancient peoples.
"Refried beans" are a mistranslation of the Mexican dish frijoles refritos, which actually means well-fried beans...
About bunuelos "Most countries have their version of bunuelos, or fritters, either sweet or savory, and they are certainly great favorites throughout Spain and Latin America.