I don't agree with sites like this. It only promotes the notion that racial identity is important for Jews. A Jew is a Jew regardless of race. I'm not Jewish but I don't see a real reason for Sephardics to only marry Sephardics or Ashkenazis to only marry Ashkenazis and so on. If you're a Sephardic and only attracted to middle-eastern looking people then I suppose it's ok, but still... What is a good idea is for people to keep their cultural identity though Smiley.
Thunderbolt, you are absolutely right. Unfortunately, many Jews don't see it that way. And I know from first hand experience, because my parents are Iranian. They believe that marrying another Iranian Jew from the community, since they know the parents and the relatives. They feel that with unknown Ashkenaz Jews, they don't know what they are getting.
But it's like this with some Ashkenaz Jews as well (although to their credit, they frown upon consanguinous marriages unlike their Iranian counterparts). For example, I have a very Middle Eastern sounding last name. So one time as a young girl in my Hebrew school, the Rabbi (who had a German sounding last name) came up to me and rudely asked me my last name, which he then mispronounced. When I corrected him, he even more rudely demanded to know the origin of the name. When I told him, he just walked away.
And I have another example for you. A friend of mine had a very good childhood friend. My friend's friend was raised by a very strict German Jewish stepfather. Anyway, this girl met a young Eastern European Jewish man, and they really liked each other. The stepfather was horrified at this, and demanded that the girl break it off. Now I don't know what happened with this girl, but I am told that she died in her 20's from a stroke.