How is Sunny Hostin still being allowed to call herself black?

@DragonFruit Less than 50% black is not black - especially if you dont look black (to the extent that a percentage can be considered an accurate method of measure). Hostin looks Hispanic because that is what she is and that is how the world sees her until she claims black. The same goes for Kamala Harris - she is Indian more than anything else and a DNA test woudl prove it. She identified as Indian when it was advantageous to do so and now it is black.
We know that those of us who are dark and undeniably black have historically had the hardest life in America. Lighter skinned mixed race people simply where granted better societal status - many passed for white when possible.
It is an insult to those of us who live a true black existence for those who have are more acceptable for light skin and mixed heritage to unjustly claim blackness.
The prime example of how modern societal rules regarding race get it wrong is Obama. Obama is at least 50% white. He was educated and reared by and with whites. He has no true black Americans experience in his life. He did not grow up in the culture. Yet the tone of his skin is enough for our society to categorize him as black and enough to dupe real blacks to crown him as the black American messiah (which he thoroughly proved that he was not).

Based on some common theories of human evolution, it could be argued that ALL humans have black ancestry as many they state that the first humans where black and came from Africa. It is a premise that becomes gradually less defensible thorough the generations as people tend to procreate with others of the same perceived race.