While I agree with the basic thrust of your comment, it seems to me that First Nations peoples have both the burden and the potential benefit and joy of belonging to both their particular and the general culture and society.  We all benefit if First Nations individuals can fully engage as members of their Frrst Nation and of the larger society and culture.

This undoubtedly entails a lot of complexity, extra work and sources for potential confusion for the individuals, their First Nation community and the general society.  However, it is hard and costly for First Nations individuals (the majority of whom now live and/or work outside their First Nation traditional territories to avoid full impact of the larger society.

Individuals shouldn't be expected to choose between 2 somewhat mutually exclusive options in these circumstances.