Though the precise identity of Moses' Cushite wife referred to in Numbers 12 can't be determined with certainty . . .
The point is clear. Miriam and Aaron are dissing Moses because he has married someone of a different ethnicity than they are. And more than likely, who he's married is a black African wife. . . . White Christians, in particular, have a long history of racism and of justifying their racism. White Christians, and in particular, the part of the country that I come from—the deep South—have tried to justify using Scripture prohibitions against people marrying someone of a different race—a different ethnicity—than they are. Such justifications—such teaching—is wicked, and has no justification in Scripture. And this is a great text to go to, because as we're going to see later, it is not Miriam who is vindicated. It is Moses. It is Moses who is vindicatedThis portion starts just after 32:00 into the sermon.
And one of the things I think that means for us as Christians is that we have an interest—we have a serious interest—in making clear that in Christ we are one new humanity, and that the sorts of things that divide the world, like ethnicity, like color of skin, have no place amongst us. We are one in Christ, and whether you're black or white, whether you're Asian or North American, is really beside the point.
Now, I think we have an interest in making that strikingly clear to the culture around us. So I think we have a particular interest in encouraging and helping couples who choose to marry across ethnic lines. I think we have a particular interest in helping and encouraging couples who want to adopt across ethnic lines, because I can think of few other things that demonstrate more profoundly to our racist culture that it is Christ who is our Lord, and not the world—that it is Christ who sets our identity, and not the world.