Breakfast tacos are not a racial stereotype any more than toast and butter. In Mexico, typically breakfast always includes a covered basket of tortillas, most often corn tortillas, flour tortillas are more common in the northern states of BC, Sonora, Chihuahua, Coahuila, Nuevo León and Tamaulipas.
The main dish could be huevos rancheros, frijoles refritos, fajitas and such.
One takes a tortilla and fills it with whatever one likes, folds it and eats it.
It is no more a stereotype than cereal and milk, or pancakes, waffles, bacon and eggs, or hash browns.