This is MY America!

[Flint]

Looking at it that way, I should have said the Vikings were first genetically assimilated, followed by the Africans slaves of the Spanish and shortly thereafter by the Spanish themselves. The French got in there somewhere, as well. But it was the Spanish who managed to implant their culture more effectively; the French (and presumably the Vikings as well) sort of melted into the Native pot. Along the way, there were plenty of isolated tri-racial communities (and not-so-isolated as you mentioned), and the very idea of a "frontier line" ignores the cultural engagement zone. Also, the reason British didn't get in the mix more often was that the colonies enacted harsh draconian policies to prevent their own people from defecting.

Blah blah blah we all get the point. The persecution of "aliens" we're undertaking now is tragically ironic. Hispanic people pre-date us on this continent by hundreds of years, and carry in them the blood of the original Americans. It won't change a thing, but that's the facts.