Actually, they followed the accepted laws of the land. Back then, might made right. The Indians of that time fought over land and the right to hold that land. 300 years later, the rules have changed and, I guess, might is less right than is turning a blind eye.
This situation is going to explode, although I do have a suggestion. Dump them all in Detroit and see what they can make for themselves. See if they can compete with the actual Americans who have no choice but to stay there. It could become a new reality show, Aliens versus Predator, Detroit. Hell, I might even pay per view that one.
