For the people who have read and understand the bible: What does the bible say about interracial relationships?

It makes no comment on races as skin color, none at all. The Jewish scriptures (xtian old testament but without the demons and hell) is only concerned with religion, that's it. The Jewish scriptures only recognize Jews and makes no distinction with the rest, but considers all non-Jews as Gentiles. Whether Jew or Gentile, it doesn't matter whether you're yellow, black, white or an alien - you're either Jewish believing or non-Jewish believing. The xtian new testament makes no comment on race either.