General Santa Anna of Alamo fame was president of Mexico 9 times, yet he appears in no school history text because they blamed him treaty of Guadalupe Hidalgo which ceded CA NM and etc to the US.

After this happened MX citizens living in new US territory were offered citizenship. ~90% accepted, the remainder repatriated or lived out their lives (and their peons lives) as MX citizens resident in the US.

"Reconquista" is La Raza's effort to reclaim the ceded territory for Mexico.

Falsifying history is a cult practise.

Self improvement requires reflection or recursive reapplication of lessons of historical experience. Without an objective historical record the process is degenerative or disimproving.

https://en.m.wikipedia.org/wiki/Treaty_of_Guadalupe_Hidalgo