This is a very wordy non-response. You should tackle the issue directly: if a significant portion of black people do not want certain people to be identified as black, it is a direct parallel to a significant portion of women not wanting certain people to be identified as women, and a significant portion of men not wanting certain people to be identified as men.
Written by Rex Kerr
One who rejoices when everything is made as simple as possible, but no simpler. Sayer of things that may be wrong, but not so bad that they're not even wrong.