These are great questions, thank you for commenting!
Okay so the first one, I would think biracial could be an appropriate delineation, but with 75% Jewish ancestry, that person may just identify as ethnically Jewish OR if they were from a more recognizably distinct Jewish subset (like if they were Ethiopian Beta Israel Jews), then they may just identify as Black OR biracial/multiracial. But of course, when there's a more complex racial tapestry, there's always some agency in self-identification.
The other question is very interesting. This is something that has come up a lot in various areas of social justice, particularly over the past decade. There are a lot of people who have been using racial labels opportunistically (whether they are accurate or not).
We've seen this come up with the extreme backlash when Elizabeth Warren said she has Native DNA (which I think was proven in a test, but caused anger at the identification nonetheless because of the lack of cultural/deeper identity connection), with Shaun King (whose father on his birth certificate is white and who looked in early childhood very much like a white kid, but who later in life became an activist and identified firmly as a Black man (and I do believe he is mixed, but he is very light-skinned), or with someone like Rachel Dolezal, who infamously lied about being Black (she was completely white, but she passed enough to lead the local chapter of NAACP).
All this to say, it's murky. I do personally think that someone who removes their picture and then opportunistically tries to claim biracial identity as justification or lending credibility to their claims is suspicious.
Then again, I think that leveraging a racial identity to lend credence to a topic you want to write about is already fundamentally opportunistic -- unless the topic in question is specifically about the experience of being whichever racial identity you hold, in which case that not only lends credence but feels like the bare minimum to lend any credibility whatsoever to writing about that particular lived experience (otherwise it's essentially fiction).
I think what's interesting and difficult across the spectrum of racial but especially biracial identities is that a lot of white-passing individuals can feel less like they are part of whichever nonwhite group they originate from, and sometimes that can cause feelings or reactions of overcompensation or alienation or defensiveness.
Whether someone is a white-passing Jew, Latino, mixed-race Black person or any other identity, their experience is fundamentally going to be different from someone who lives in the constant externalized public recognition and reaction to their perceived identity because they cannot hide it or blend in.
And that's not wrong; it doesn't make them less of whichever non-white racial identity they belong to (though there are certainly voices you'll hear out there who argue they are; I've heard many Black activists argue that very light-skinned Black people are white. Not my fight to argue, but that seems reductive to me-- but I understand the qualification as diametrically opposed to the experience of being very dark-skinned and Black in America, or wherever).
But I still think if you're going to be hammering in on that and using that for your online writing, it would seem very strange to hide your face! White and white-passing multiracial people are just as entitled to share opinions, essays, etc. -- but certainly becomes more questionable when those are in any way being used to demonize or cause harm to or speak over people with other racial identities, of course.
That was very long haha but it's an interesting topic!
