"Jesus would rather kill, not marry, gay people" - Franklin Graham

[RoadRunner79]

I think that you are going to have a difficult time trying to justify miscegenation using the bible or Christian tradition.

In the 19th and early-20th centuries, state courts in Indiana, Georgia and Pennsylvania cited religious reasons for preventing different people of different races from marrying each other. In the 1960s, the trial judge in Loving v. Virginia – the case in which the Supreme Court struck down state bans on interracial marriage – wrote, “Almighty God created the races white, black, yellow, malay and red, and he placed them on separate continents. And, but for the interference with his arrangement, there would be no cause for such marriage. The fact that he separated the races shows that he did not intend for the races to mix.”

After the Supreme Court invalidated bans on interracial marriage, Bob Jones University still argued that the freedom of religion provisions of the First Amendment allowed it to ban interracial dating and keep its tax-exempt status while doing so, because its “rule against interracial dating is a matter of religious belief and practice.” And after the Supreme Court rejected this argument, in 1983, the university continued to ban interracial dating until the year 2000.

Deja Vu All Over Again: Religious Objections To Interracial Marriage And Same-Sex Marriage

I'm not saying that it hasn't happened, but I think that their case was pretty weak from both a Biblical and historical (practice) standpoint for the Christian belief to use that as a reason. It's just not supported.