In Britain, those who paint themselves blue and put on animal skins as if they are ancient Celts are correctly regarded as a bit kooky. But they do so only as a leisure activity and do not assert a land claim to all of England.
As it is, the supposed members of the resurrected tribes live like lottery winners if they can and do not try to adopt a tribal lifestyle. In other words, the resurrected tribe is about the cash, not being a tribe in any meaningful sense.
What New York needs badly are more reservations covering more territory. It cannot help but be improved.