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@Stronn
If you prefer to hire white employees over blacks, it's racist. So too if you prefer to date whites over blacks.
Yes, some people are "unintentionally" attracted to physical features that they associate with a specific race. But that's usually a cultural artifact, one you can change through increased exposure. As with foods, you can expand your palate to include items that initially induced a gag reflex. If you're young and a committed anti-racist, porn might be useful in this respect.
But more importantly, physical features shouldn't be the only or main factor you take into account when dating. Find someone whose personality you enjoy. And the physical attraction will usually follow, if you allow it.