It amuses me that these poseurs express themselves in Spanish rather than Nahuatl. .... Psalm 144
Exactly. They are not "Latinos". They are "Mexicans". A true "Hispano" or "Latino" visitor in Mexico gets a lot of whining about "how the European Spaniards conquered our land".
In Spanish-speaking countries, "Hispano" (from the Roman province of Hispania) means "relating to Spain itself".
Hispania and "Hispano" are to Spain as Britannia and "British" are to Britain.
In Spanish-speaking countries, "Latino" is a general term that includes all speakers of all Latin based languages. So, the term also includes the French, the Italians, the Portuguese, the Brazilians, etc.
At least the Mexican activists who drew up this poster got it correctly:
The irony of the entire Aztlan ideology is that the descendents of the Mayans and the Aztecs did not originally conquer what is now Texas, California, New Mexico and Arizona from the native tribes. The European Spaniards did.
If there is any ancestral claim to what is now the American Southwest, that claim belongs to the descendants of the local Native American tribes and not to the descendants of the Mexican tribes from Central Mexico or the Yucatan.