You cannot become an Indian. You are either Indian or non-Indian. Indians are, quite simply, spirit. Anyone who is a part-time Indian is only part Indian. No part Indian is an Indian.
Nobody can serve two masters.
Whatever is uppermost is single in nature. Accordingly, No one can cherish two sovereignties at once. You must cherish Indian sovereignty or another sovereignty. No cherisher of Indian sovereignty is a cherisher of another sovereignty. No cherisher of another sovereignty is a cherisher of Indian sovereignty.