Is his profile name the only indication of his ethnicity? Or did he clearly state it in the reverse booking?
several girls state preferences, their Do's and Dont's, Will see/Won't see, Oral with/owo etc. on their profiles but they often stretch those 'generalities' at their own discretion and that may well be the case with this lady. Perhaps the OP's mate profile name made it clear that he was black but nevertheless that didn't stop her replying to a reverse booking, presumably knowing he was black .
Rather than the OP's mate asking for clarity he did respond rather negatively...'
don't waste my time please' to which she reasonably responded that she
DID see blacks '
If they were respectful' so clearly the door was 'open' for her to see the OP's mate if things had gone well.
However he told her not to respond again and that was the end of it.
Some guys won't see black women and sub-consciously dismiss any bids they may receive from them., others may dismiss BBW women from their search, or redheads, or dwarfs.... it is all a matter pf personal preference and experience. If a WG has had various bad experiences then she should be entitled to be selective as to who she sees, just as she can choose what services she provide,s what she charges, when she works etc.