In my humble opinion.....as always
In our perfect world, if the colour of a person's skin was to be perceived as irrelevant, it would take humanity 30 seconds to find another difference. We are inherently unique and individually different.
Personally, I do not read "whites only" as being a racist choice, but a preference of individuals in the lifestyle. Coming from interracial parents, and being in an interracial marriage myself, I have been exposed to most of the ugly forms racism can expose itself to. I have been around the block many times, and have been intimate with all races and nationalities alike and not once have I experienced racism as you call it. I have been many woman's first... and probably disappointing enough to be their last. I apologize for this revelation - the colour of a person's skin does not make a sexual difference. But your approach to intimacy does, respect does, your personal preference does..etc etc.
Your profile choices are personal:
Only wanting to play in your own race does not make you racist.
Only wanting to play with straight people does not make you homophobic.
Only wanting to play with women does not make you misandry.
The list is endless.
Now I may be crucified for this statement...7.5 billion people on the planet, a few hundred choose not to have sex with you...grow up..move on...build a bridge and get over it...you cannot see the forest because the trees are in the way.
My humble opinion...as always