Well, if they’re all about giving land back to original occupants, then after they “take back” the southwest, they’d better hand it right over to the Navajo, Chumash, Pueblo and Apache tribes. They were there long before Mexico moved in.
I’m of Apache ancestry a few generations back (but still a helluva lot more than Fauxcahontas) and it’s very well known that the Apache hated Mexicans with a red-hot passion. The stories of what the Mimbres and Chiricahua did to Mexicans would turn your stomach.