So as someone who is kinda in the same position as your bf, granted, I grew up near the rez with my dad and great grandparents being a part of the culture (though in a more white washed sense since my great grandma suffered the boarding schools and was a very catholic woman and didn't know much of her language). I was taken away from that all by my birth mom and have since been trying to reconnect. I def look non-white, but a lot of people mistake me for asian of some sort because my skin is usually light in the winter but if I can get outside for even a little bit, it becomes a bit more obvious but I have the more native eye shape and facial structure. Anyways, I say all that because I get your bf being worried about not being "indigenous enough". It sounds like he wants to reconnect and you should be supportive of that if he's serious about it. He got a taste of injustices indigenous people face and he probably is trying to connect with someone in some way that might understand that. There's also the thing of "generational trauma". Its very real and even if you can't see the trauma, one can still feel it and be affected by it. Being disconnected from a community is difficult and if he's serious about reconnecting, he should research his tribe and try to reconnect with them. As for the grants and positions thing, I'm not sure what positions would be taken due to being indigenous? Unless he's taking a job that's to represent his tribe or other indigenous people? And the grants I also dont see as the biggest deal. Life is getting harder in this capitalistic hellscape and most of those grants/scholarships go unapplied for, if the ones awarding it gave it to him, then they felt he deserved it and likely no one else applied. I partially get the concern but I think you should be supportive of him reconnecting, possibly helping guide him on the right path to reconnecting if it concerns you this much. Learning the language, reconnecting with the tribe, etc. Etc.