In the Old Testament, it does say something, somewhere, about not marrying someone of another culture (something along these lines. I'll have to look it up for the exact wording). But, whenever my uncle would quote this verse to me, I would remind him that Moses married a "dark-skinned woman." I can't remember how he tried to justify that, or if he said Moses sinned in doing so. Can't remember. But, I think it is in reference to culture and religion as opposed to the color of one's skin.

Yes.