That depends really. Does liking one person out of a demographic mean you don't dislike their demographic/s as a whole? I mean, I know there are plenty of memes of white supremacists with yellow fever and/or antisemites with jew wives.. But I don't think the odd exception means someone can't hate X/Y/Z. Dunbar's number (maximum meaningful human connections) is only ~150, and the human population is currently estimated at ~8,018,395,750. So only 0.0000000187% of the population can be meaningful to us.

I think disliking/hating 99.9999999813% of humanity is probably safe to round up enough to call someone a misanthrope lol.