Firstly please don't tell me that it shouldn't.
With colonized/formerly colonized countries like Palestine, South Africa, Algeria etc it seems pretty straightforward, since indigenous peoples are still large majorities of the population, but much different in America, since the eradication of indigenous people and their societies and cultures has been happening for centuries and now indigenous people only make up 1.3% of the population. Not to mention that the american population is made up of immigrants from around the world besides the descendants of settlers.
I'd say that's up the the indigenous folks. I don't have a very detailed opinion on it in large part because no one will ever ask me for help drafting the landback policy, but in general terms it's a safe bet that indigenous peoples engaged in a struggle for liberation will typically approach the issue of other peoples' liberation humanely.
The few indigenous voices I've heard talk at length about landback have been opposed to creating an ethnostate, even in cases where the leadership is meant to be fully indigenous. It's worth noting that ethnostates as we know them are contingent on global structures of white supremacism to shape racial dynamics