In Aztec mythology Aztlan was their original homeland and they migrated south to what’s now Central Mexico presumably because Athabaskan people’s like Navajo and Apache were migrating into the region and kicked them out. Because their language is connected to the Ute of Utah, New Mexico, and Colorado this makes some sense. However they’re also acting like they are all the legacy of the Aztecs for that reason when I’m fact the Aztec Nahua peoples weren’t even the largest Indigenous group in Mexico. That distinction goes to the Mixtec-Zapotec people. The Tarascans were also pretty large at one time, but kind of received special treatment for the Spanish for being allies against the Aztecs and Tarascan women were renowned for their beauty by Spanish settlers because they never did all the bizarre body modifications (tattoos, piercing, cranial deformation - all were forbidden in the Tarascan religion) others did and so a lot of them who even identify with the culture have some European ancestry, Mayans also outnumbered the Aztecs. Most Northern Mexicans with indigenous ancestry come from Yaqui or Cohuilatecan stock. Now why is any of this important? Because the Aztecs fucking hated all of these people, were almost perpetually at war with them, and often sacrificed them after battles. The legacy they’re trying to claim with Aztlan is almost identical to the Nazi German concept of Lebensraum when framed this way.