This has been known about for a long time. In the late 1950’s when I had anthropology/archaeology courses in Mexico I read about this. I read in the original Spanish “Cortez’ Five Letters to King Carlos” of Spain, and Bernal Diaz, one of Cortez’s lieutenants concurrent record of his experiences. I would read one episode in one and then read the same period of time in the other. Subsequently, I also read Salvador Madariaga’s “Heart of Jade”, also a very realistic and bloody historical novel. These are all excellent books if you can find them.
I've been there numerous times and seen for myself.