There was a Caribbean lady at our hall who felt the same way about white chicks. I think with her it was not so much that she didn't like them but more along the lines of she felt it was an insult to black women for her sons not to marry one.
Maybe this is more prevalent with people from outside of the U.S. for this reason. Now, I could be wrong of course, but maybe a black woman form a black nation sees her race differently than one from the U.S. where it is more of a mixed population. It would be the equivalent of a white mother who was from a country where there were only white people. She is not comfortable with mixed marriage because she is not exposed to it as some others are.
This sister would tell my mom (My mom is white and they were VERY good friends so this sister didn't hate white people.) that her reasoning was she felt that in today's society black men who are successful will sometimes marry a white girl as a sort of "trophy". She said it was an insult to black women.
Now, if I were a black woman and I saw this happening, I would be insulted as well. Of course there is nothing wrong with mixed couples but only if it is done for love of the inner person. What I don't approve of (not like you care) is someone liking another race just because they are that race. This is discriminating on a different level. If that person wasn't that color would they have gotten a chance to date you?
I've known white girls who would only date black guys and vice versa. I've also known black guys who would only date white girls and vice versa. I believe that what is on the inside should be the deciding factor not to have a status symbol or be cool or whatever reason.
Before I get misunderstood, let me say that I have NO problem with mixed couples who love each other and also NO problems with any other race. If you knew me you would know that I'm as liberal as it gets when it comes to race. My one sister in law is black and my other sister in law is Puerto Rican. I grew up in Jersey so I am well mixed in with everyone and I like it that way.