It’s a thing racists used to believe; that if you were say 1/8 black and 7/8 white - you were black because being white was about being ‘pure’ there was even a slur for people who 1/8 black (Oct*roon).

Thing is now that there is a very strange culture that is now using minority status as some kind of social currency - people are reverting back to the one drop rule without realizing its history.

People who are 1/8 black claiming to be ‘black’ but not white only really makes sense if you see white as some kind of default that gets changed or corrupted or whatever by other blood.

In reality being white or black or whatever is really just a pile of genes that originated from some region, and even then ‘white’ and ‘black’ are social classifications of a mix of a variety of ethnicities that don’t really make sense fo all group together the way we do.

So someone that is half black and half white should be referred to as both or mixed- because erasing their white half is really cloaked in racism.