And if you want to set up a programme to help people who look black, fact, by all means do so. Looking black is no more something that can be 'identified as' than being of mixed heritage is.
Passing privilege refers to someone who is part of an oppressed demographic but appears like they might be part of the dominant group so benefits from their societal privilege. Therefore, someone who IS white but looks like they aren't isn't benefited by passing privilege because they dont pass.
If your programme is for people who are of mixed heritage, however, those who look white are as entitled to it as those who look black.
Yes of course. However, people who look either white or black will usually experience gatekeeping from others. Often people who aren't part of the group in question. My FIL identifies as mixed race because his family are mixed with indigenous Caribbean people who have coffee coloured skin and long,loose hair. He has black skin and tight,afro hair so most people would call him black. Even black people.
If your programme is for ethnic minority groups then white ethnic minority groups such as travellers have as much right to it as those from black ethnic minority groups such as those of Nigerian descent.
Yes white minority groups are also a oppressed demographic. Unfortunately, they rarely feel part of general BAME groups and some would even be offended if you suggested that they'd benefit from a group which was also targeted at black people. I know this from experience, unfortunately. They elevate their whiteness. Haven't you ever been surprised at how someone who isn't British but is white assumes that other Brits see them as the same? I've had,for example, an Eastern European person assume that they could share racist views against black people with me because I am white. Having a black husband and mixed kids, I was totally the wrong person but what surprised me most of all is how she spoke as if my group (white Brits) arent as discriminatory against her group (Eastern European) as they are black people. She spoke as if EDL Dave would be fine if his son brought her home but not if he brought my daughter. It was bizarre but this also occurred pre Brexit. She probably gets the idea now.
Decide your criteria, then apply it to people who actually are that criteria not 'anybody who identifies as' that criteria.
But who decides if someone is that criteria? I mentioned my Trinidadian friend whose DNA likely shows that she is from the Indian subcontinent. She looks like she is from India. She speaks like she is from London. How far should she have to go to prove her suitability for a Caribbean group? Should the fact that she grew up in what is a black country and has far more in common with a black Caribbean person than an Indian person qualify her for black spaces?
This is why self identity is necessary. The world is too complex to gatekeep.