If Native Americans had our immigration laws:

[Igel]

6. We have some idea as to what happened in various places.

In New England, the new-comers made handy allies in a war.

In Central America, the new-comers were picked up by a liberation organization activist out to fight the imperialist oppressors of his people.

That the new comers then turned on their former allies and bested them, as well, in military conquest (thus playing by their own rules--conquest yielded possession of the land) is, well, less unfortunate as entirely expected.

Even the tribes in Texas decided to make use of the Spanish in their effort to fight against the genocidal invaders known as the Apaches.