Still, a mixed race marriage can be problematic in that neither community (race) tends to want to claim the offspring. While we are getting more tolerant in Europe and America I can tell you that as a people we still have intolerance in each and every country and that intolerance has become stronger as we also become more divided. But since the question is in reference to it being a sin, is it a sin to marry knowing you are going to take the family down a very difficult path, even today?
You gave quite a bit of personal background there. Thank you for that. I will give you my own experience on this very subject.
I'm a white guy, from the Midwest. My wife is a black woman, from the French West Indies. Our daughter is, therefore, mixed race. In a quarter-century of marriage, and 17 years of raising a child, it has simply never been much of an issue.
We've encountered the tiniest bit of racism, on the very fringes, directed at us for a few moments by some fat, dumb white guys out in the Midwestern countryside, and by some [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse]y old black racist women on a subway platform in Harlem. This constituted a grand total of perhaps 4 minutes of total experience in twenty-five years.
My daughter manages to annoy some people by having her own ideas about everything, and not caring a fig about what people are "supposed" to be, or think.
Truth is, it is simply not hard to live as a mixed-race couple, or mixed-race child, in educated, prosperous America. I suspect, but don't know for sure, that the further down the socio-economic scale one goes, the stupider and more bigoted people might be - certainly the people who gave us a hard time were exemplars of low-class, low-education dumb-***es. So, when they said what they said, what they got back was the cold stares of us, their socio-economic superiors, looking down our rich noses at them with full contempt for everything about them that was beneath us. In other words: yes, she's black, I'm white, and you're dumb and poor, get out of our faces you idiots.
Because really in America money talks. If you study in school you can succeed no matter where you started, and once you do, you don't have to live with morons any more, whose only claim to self-respect is that they think the pigment of their skin means something. The fact they think it does actually DOES mean something: they're lower class folks who can go rot somewhere.
That's really the truth. If you use the education you were given, you don't have to live with people like that anymore. And really, it is not at all hard to live very nicely in America as a mixed race couple, or a mixed race child. The people full of hate are dimwitted, and they end up living together in wretched places, and you don't have deal with them at all.
When we travel down South, particularly in the more rural areas, people in the diners and hotels bend over backwards to be nice to us, to show they're NOT bigoted. When you're in an interracial marriage in America, you frequently get treated with kid gloves precisely BECAUSE people are worried about being offensive.
And in truth, the whole novelty about being a "different race" wears off in a year or two, and you don't even think about it at all unless somebody brings it up, which they really don't.