I don’t have a position on Indian citizenship - which was what this case was about.
Go read Sloan v U.S.
No, the case was about a White man claiming to be an Indian. It was about him NOT HAVING INDIAN CITIZENSHIP. Indian Citizenship would have protected him. The Judge ruled he didn't have it.
Go read Sloan v U.S.
I've already got it up. Trying to read it between answering messages. The syllabus doesn't look very promising for you though.