Of course your ancestors were immigrants. Maybe not your immediate ancestors, but going back a few generations they were. Unless your ancestors were Tonto and Sitting Bull.
No our ancestors were not immigrants, Brits moving from British soil to British soil are not immigrants.
No, not immkigrants. They were colonists and pioneers.
Oh and yes, a few of them were indian fighters as well; including one who was with the group that tracked down and apprehended King Philip when he was on the warpath.