I have a degree in Native studies, spent much of my youth attending powwows and gatherings all over north, south and central america, have written internationally published articles on indigeneity and indigenous peoples, but yeah you are right, I haven't researched anything and if you google my real name you wont find any of those articles lmao.
BHI, and NOI both spread the nonsense that "real indians are black" it is nonsense. Tribes here ranged in looks but literally the only ones who looked like "black people" were from the west indies which is not north america. in south america the miskitoo, are mixed blood and look black and many cherokee and choctaw are black because they mixed with freed slaves, but the first nations in North america are not black and have never been black.