Actually up until the middle of the last century interracial marriage was preached against in most protestant churches.
Actually up until the middle of the last century interracial marriage was preached against in most protestant churches.
I agree that interracial marriage was not advocated in protestant churches up until about the last quarter of the 20th century. The mainline denominations appeared to verbalize acceptance of the concept, but in reality, there were very few interracial marriages even in those churches.
And while there is some evidence that the Roman Catholic church as not opposed to interracial marriage, the frequency of interracial marriage among Roman Catholic whites was quite rare.
I have less information about Christianity and interracial marriage in the remainder of the world, and it will be harder to come by because the definition of interracial marriage would be quite different in other parts of the world.
That said, the position of the majority of Christianity is either silence on the subject or an acceptance of it in official circles. My guess is that in most places it simply wasn't an issue primarily because there was no intermingling of races to the degree there was in North America.
So, to answer my own question: (1) there is no serious theology in Christian history that rejects interracial marriage. (2) There was a theology of same-race marriage in America. It was a formal theology in some churches, and it was an informal rejection of interracial marriage in most of the remainder.