No. we can't hep what attracts us. It's usually established by the time we hit puberty. I am a white woman of northern European ancestry who doesn't find fair-haired men with ruddy complexions (a certain type of Englishman, more or less) attractive. Obviously I'm not a racist for feeling that way, since they belong to my own group, and I couldn't begin to explain why such men turn me off. It's just the way I've always felt.
However, if you run around claiming that certain groups are just inherently unattractive and physically inferior to others because of their features or color or some other aspect of them that is part and parcel of their ethnicity, that is racist. And if you're entirely closed to the idea that some members of that group might actually BE attractive, that's racist, too. I mean, I think it's possible that I might someday meet a blonde guy from the UK who I think is very attractive.
You never know.