They are neither Natives nor are they Indians. There are no Native Americans. Everybody came from somewhere else. They are more closely related to Southeast Asians than Indians. It's just Columbus and the Spaniards were lost while trying to find a shortcut to Asia and thought they had reached Asia so he named the people he found Indians. It just caught on for some reason.
I would look at them first then meet them, get to know them and then you'll find out. If you don't want to do that I would just run down the street poke them in the stomache then scream as loud as you can... ''INDIAN!'' And I am part indian soo, your choice