Aside from your racial opinion that all Indians live on reservations, (as if you think the Palins live on a reservation), Citizens of their nation were not immigrants, they were merely moving to a different portion of their nation's soil.
“Citizens of their nation were not immigrants, they were merely moving to a different portion of their nation’s soil.”
Ah, wrong, sorry. Since your ancestors were not originally in the country (aboriginal) then they were nothing more than invaders to those who lived here long before they came (the aboriginals). So they were, in other words, illegal immigrants and foreign invaders.