I think this issue has been given too much attention. I'm not a globalist, so I shy away from phrases like "Global Community" and the like. I also believe that if God can and does accept anyone regardless of race etc, we should try to imitate that notion. This is the litmus test.
I think every intelligent, free thinking person should seriously question the talking heads, politicians and professional race baiters like Sharpton and Jackson who prey and PROFIT on racial tensions.
I have mixed kids, my grand kids are mixed. My present and last wife is a latina. I have never focused on race with my family outside of occasional, light hearted levity. I never made it an issue, so my kids never learned that it was supposed to be an issue.
My family crosses the racial and cultural divides. I have learned that people usually have MORE in common than not, though I would consider culture a more important issue than the non-issue of race.
I wouldn't call this a phenomenon, mankind have intermarried since the dawn of time. For the most part though, and based on my own experience, the problems you may have, are likely the problems you have made....generally.
The fly in this ointment is stupidity and ignorance. These are the ones who support race baiting. Alas, there will always be stupidity and ignorance in this world. It's best to ignore them because you can't fix stupid.