The same ambivalence marks Muslim Thais living near Malaysia. Ireland, non-Hawaiians in Hawaii, Anglophones and indigenous peoples in Quebec, Serbs in Kosova, Israelis settled in Palestine, etc. Perhaps we could think of them as citizens of an exclave who feel threatened by the ethnonationalists. Borrowing from the Irish situation, we could speak of them as unionists . I suspect that in many enclaves, ethnonationalists confront more unionists than they do in exclaves.
Indigenous people become ethnic nations when they mobilize to seek independence or autonomy.
Their status, therefore, is not permanent but may be transitional. Rwanda and Burundi for leading examples. My focus has been on the historical and geographic dimensions that need, I think, the concepts of enclave and exclave . I never intended to offer them as synonyms for any of the terms you and others are using. Rather, they are additions which belong, in my opinion, to the enriched vocabulary we need to analyze these phenomena and develop good explanatory theories.