Let's look at this from a normal legal situation. You own an item that was stolen by thief A. Thief B then steals it from thief A. Should your item be returned to you or to thief A? Your logic would indicate thief A. Nobody thinks that would be the right solution and yet when it comes to native lands nobody cares. I just want some consistency.
If you recognize them as the rightful owner at the time, make an agreement for exchange, then the burden of consistency is on you. Buyers remorse is not sufficient to unwind your obligations while retaining the property.
Another way of resolving this is simply recognizing that conquest does not create obligation, but diplomatic agreement does. It is a matter of integrity and honor, literally, in the sense of do you honor you commitments or are you a liar.
While repugnant to some, I think this is quite clear. In the cases where settlers simply took land by force of arms, they created no legal or honorable obligation. Where they took land by legal agreement, they have created an obligation.
Im saying that if you fully acknowledge someone to be the rightful owner and something, you dont get to change your mind about paying them, and call them a thief with no new information, and then keep it for yourself.
IF the US somehow discovered evidence that it bought stolen land, and chose to pay or return it to the original holder, that would be one thing.
Simply not paying and keeping something for yourself make YOU the thief and a liar too.
Once these treaties expire, assuming they are ignored, the land does become stolen.
I don't expect the tribes to be unreasonable about the land and take up land-grabs, it will likely just be a matter of taxes going to one entity instead of another.
Something being costly does not absolve you of your moral, legal, and honorable obligations. It is not a justification for ex post facto recontracting.
I would like to see the government uphold it's obligations, stop acting weird exceeds these obligations, I work towards permanent Solutions where advantageous. This may include buying out of contractual obligations for purchasing Indian land and rights
Because individual actors and even nations are discontinuous over the thousands of years we are talking about, we are stuck with treating racial and ethnic lineages as the actors, blurring the lines. The Thief and victim can be the same. Lets say a deceased grandfather (A) was robbed by a now deceased son (B), depriving the living grandchild (C) of their ancestral property. Living Indians, party C, are the decedents of both the thief and victim. It still makes more sense that the stolen goods should go back to them, than stay with recipient of the stolen goods.
Anchoring back to reality, I think the whole thief analogy is bogus. At the time treaties were made with Indians, possession by conquest was considered a valid means of acquisition, and Indians were held to be in sufficient standing to enter agreements.
Rationales which try to retroactively invalidate the historic land ownership by natives, and thereby invalidate contractual obligations, are logically bankrupt if they dont also attempt to identify a rightful owner to return the property to.
Not only is our opinion irrelevant; our opinion has been abundantly demonstrated to be awful in every single way. We need to stop.
Giving it to the last inhabitant, yes possibly conquerer, is really the only choice we have (apart from doing nothing and stealing the land) - to put things back the way they were.