The ethnic discrimination laws in America Samoa, and to a lesser extent Saipan (I think for them more about control, they have no problem with Chinese running roughshod operating all kinds of shady and illegal business, it is probably the most corrupt place in the US) are aimed towards stopping cultural elimination. The case is compelling for Samoa, the others are just naked racial discrimination as the local populace seems to have settled on the fact their culture has pretty much been eliminated as anything beyond a footnote and they're going to cash grab all they can out of the remains which I guess is just the usual American dream.
(Hawaii used to go even further, and racially discriminate in voting, but racial discrimination in voting was struck circa 2000 with dissent written by the now deceased racist Ruth Ginsburg in Rice v Cayetano. Not long after that 'non-'Hawaiians also finally got the right to equally run for office).
American Samoa is particularly aggressive about it, their government and IIRC even the feds strongly imply or command you can enter for 30 days as a tourist without further authorization, despite the fact that established case law and the American Samoa Bar training to internal lawyers teach that US citizens have the right to permanently settle and work in American Samoa. I did some research and could not find any case of a US citizen being 'deported' from the territory unless they were wanted for crimes elsewhere but they do their damnedest to make it sound like you can be.