This makes perfect sense I think.
There are all kinds of things women, or Jamaicans, English people, blind people, Catholics - all have any number of intrinsic things in common that mean they might like to get together for some kind of event.
But race? I would say on the face of it that is a very differernt thing. There is no inherent positive characteristic that can be found around race, the only things that are there are negative where the law or custom has arbitrarily defined skin colour as creating commonality. And we know that to be false and wrong. A dark skinned Jamaican, Nigerian, Indian, and Australian have nothing intrinsically in common just because they have darker skin. They have totally different ethnicity, customs, histories, and cultural beliefs, not to mention not necessarily being particularly likely to be related genetically.