“simply identifying as ‘black’”
I believe American Indian tribes often insist on a minimum of 1/16th tribal ancestry to be considered a member.
I’ve read the tribes require more than that. I don’t think you can join after discovering your ancestry. I think you need a connection to the tribe and traditions.
Ah. But...doesn’t that run afoul of Leftists who say anyone can be anything if they think they are that thing?
Granted, if there is money involved...they are much more rigorous unless there are citizenship issues involved.