Honestly, unsure. I dont think that you have a particular obligation to have sex with any sort of person, and I do think that you have an obligation (not necessarily a legal obligation, but a “being a decent person” one) to not be racist. It isnt exactly unusual for a person to prefer their partner belong to a specific category (for example, a gay man is likely to refuse to consider being with a woman, but I dont think they would be a misogynist for that). That being said, there isnt a particular difference between all white women and any other sort of women that would make for much of a reason to do this beyond just hating white women in particular, whereas for a woman, there is a notable difference between a man and, for those who would be attracted to them as well, a woman, as far as partners goes, because with a man, there exists a possibility of pregnancy, which could be dangerous in the current state of the country.