If I had a daughter I'd prefer that she not date that boy because he isn't white. I value my cultural, ethnic, and racial identity. Just like most blacks get upset if their child brings home a white girl, indians flip a shit if their son wants to marry a white girl, chinese and japanese sometimes threaten disowning their children if they intermarry sometimes, and arabic people will even kill their children over it. It's a common theme which is very well trodden across all racial groups. For some reason it's only portrayed as "racist" when white people feel this way.
Well, I wouldn't react as extreme as any of those examples. I would try to explain to my daughter why cultural, ethnic, and racial heritage are meaningful to me, and why I think they should be to her too. It's not about hating other people, it's about loving your own people. It's the most natural thing in the world, yet only taboo for white people ... I'm not afraid to say so, because I know hate has nothing to do with why I feel this way.