Some people have expressed that because their people have been present for thousands of years,it is still theirs to do with as they please.... yet,
...they having lost the Mexican/American War, and their leaders signed the Treaty of Guadalupe, which gave them 1/2 of what was conquered known today as modern day Mexico & paid them for the other half annexed into the SW USA.
USA Paid the conquered Nation, an amount more money than the Louisiana Purchase price of Land from France a few decades earlier for much less land already conquered and surrendered in War.
Ask the Descendants of the Aztec Club of 1847 what they think of this.
It might be an interesting perspective to consider.
https://www.aztecclub.org/