By human standards, ants are racists. red ants and black ants engage in genocidal, no make that insecticidal warfare all the time.
=====================
Indians have a hard time growing facial hair. With difficulty an Indian grows a wispy moustache like Cantinflas, the famous actor.
Most Mexicans are mestizos, that is part Indian and part Spanish (or perhaps French). The idea of growing a moustache stems from the Mexican idea that it is better to be a European than an common Huehenche, Naco or Tlaxcalteco. The more Spanish one is, the better. Hence a moustache is a sort of racial statement.
City Mexicans consider factors beyond just the moustache. One thing is, indios tend to wear hats with a dangly thing at the back of the brim. City Mexicans always wear hats without the dangly thing, but most never wear any hat at all. Baseball hats are worn for sports by some people.