A few months ago Thabiti Anyabwile wrote an article challenging the idea that there are distinct human races. I recently read the article (available here), and I think it is fascinating. I’d encourage you to give it some thought. When you do, I would be very interested in your response to both his reasoning and his conclusion.
Here’s the gist of what he believes about the question of race:
Strictly speaking, the Scripture knows nothing of our contemporary notion of “races.” People may have different skin color (or hair color), but they do not therefore belong to different “races.” The idea of “races” is, therefore, a fiction. There is but one human race descended from one parentage, all of whom are created in the image of God spiritually, rationally, morally, and bodily.
Hmmm. So maybe interracial marriage actually looks like this!