Local Washington State NAACP Leader Outed By Parents As White

[Alex K]

And how do you decide "being black"?

Having significant/noticeable African ancestry? I think it's a fair criteria.

criterion

It's what society decides is black - For the most part, that's people with a majority of African ancestors -

That's a bullshit criterion.
Are you ready to enact a fixed rule that only those with a majority of (recent) African ancestors can work for such social justice causes. That criterion would exclude President Obama, for example. Would you have a caucus about who's black enough?

For mixed race people,

That's another bullshit term. Africa is the most genetically diverse place on earth, and there is no such thing as a clear definition of "mixed race.

they get to decide which side they wish to identify with, but they mostly pick non-white ancestry because, for some reason, we tend to perceive fully caucasian people as whites but anyone with a little of non-white noticeable ancestry is automatically not white.

Until it is dilute enough