Hawaii is a state in its own right. Under that delusion you have 49 other instances. They elected to join the USA in 1959.
Samoa was colonised in 1899, no one argues that things were done in the past. Samoa has been self governing since 1967. It has the capacity to hold a referendum to move away from being an “unincorporated territory”.
Northern Mariana Islands elected closer ties to the US because Guam did not want them through a referendum.
Texas has been part of the US since the civil war ended. Half of the world has changed since then.
I agree indigenous tribes should have rights, but how that is applied is always going to be contentious because of the generations that have past. It is not like you can tell the majority of a nation to go live somewhere else is it? As for the tribes concerned, they were kicking the crap out of each other before the Spanish arrived. How far do you go back to say who owns the rights to that land?
You really should research before buying into the crap people spout online.