This really says it all, doesn't it?
I guess these Mexican officials are "racists", like everyone else who points out the obvious.
If you can find a definitive work about this that predates liberal history revisionism, you'll see that Mexico and its citizens murdered a colossal number of Mexico's indigenous population, specifically of the Yaqui tribe.
The Mexicans are and have long been an incredibly prejudicial bunch of folks. Those that are "pure" Spanish lord it over the "Meztizos" (mixture of Spanish and Indian), and Meztizos over the Indian. And it doesn't suit their self-image that the "pure" Spanish are loaded with Arabic blood from the Morrocans' occupation of Spain for some 800 years.
Then to complain about some "yanquis" being prejudiced against them makes me wonder if there's a word in Spanish that correlates to "hypocritical."