I believe you are in North America. (If not, humour me for a second) Do you eat food grown there? All the land is effectively stolen. All the food grown is thus tainted.
The food, the site where I live, everything, yeah.
But, then, really, I'm totally screwed in that regard - I was born here, so I have no real claim on a place in any culture other than this one, and this one is ethically flawed at its foundation. So, I really have two choices - one is to simply end my life as impossible to live ethically, or I must come to some accommodation between my current existence, and the history on which that existence is based. Obviously, I've chosen the latter.
The same thing holds for every ethical question over time - you have a choice to completely eschew, or come to some accomodation with the past.
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