The school in question is Monterrey Tech in Mexico. Robin and I have both taught classes there at the original campus in Monterrey.
It always amazed me when, while we lived in Mexico, people there would frequently criticize the US for racism and then go ballistic when I suggested that a similar phenomenon existed in Mexico.
But people, exist it does. By and large, those photos are what rich Mexicans look like.
The tall & light vs. short & brown divide is immense. I wonder when modern Mexico will get its Alejandro Toledo or Evo Morales (of course they had theirs back in the day, the inimitable Benito Juarez).
I thank an anonymous faithful reader of Sailer's blog for the pointer.