I could be wrong... but don’t you mean the Aztec peoples, not the Maya?
I am not an expert on Conquest, Crusader, or Conquistador history so anyone feel free to jump in here.
History teachers get the most points, of course. :)
Even if their claim were true it would not entitle them to cross a border with impunity. The racist organizations that are brainwashing these people need to be disbanded.