Op you seem very angry!
I have a friend (you can search my threads) who was born in Jamaica as were her sons.
She came to England and married a white man and lives a very nice life in a very nice village and has lots of very nice friends who are all white cos that's the demographic of this particular village
Quite honestly I think you have a stonking massive chip on your shoulder.
What has your friends experience got to do with the different experiences of other black people?
I know a lesbian who married a nice woman and lives in a nice village and has straight friends. Doesn't mean the people who wanted the LGBT boards have the same experience as my friend or that I'm asking for that space they have a stinking chip on their shoulder.
Your mates life isn't universal and if she's a MN user why are you speaking for her? If she's not, then why would she be bothered about a space being created for other black people on a website she doesn't even use?