You know what the fly shit about this discussion is? The fact that the next generation benefits from it. I don't know about anybody else's fam, but I know my pops' fam was on that "Don't you bring no white girl in this house!" ish. And I know that was a common attitude then, and probably still is today, but I think it's less common. My mom used it jokingly, and if I have kids they'll never hear it.
I don't agree with anyone who sets out to date only one race, whether that one race is their own or not. I think people in real interracial relationships are brave souls, cause they catch it from their own race and their mate's race.
If you can be friends with people of another race, then you can be more than friends with them, too. If you can't be friends with people of another race just because they're of another race, then you're an asshole, or a coward.