General Discussion

The OP presented data about interracial marriages, data that showed significant differences in the gender composition of the possible pairings. It's a fact about our world and so the OP wondered about it. I see nothing wrong with expressing such curiosity.

Meanwhile, elsewhere on DU, there's a thread about possible life on Europa. It's highly likely that no one now reading DU will ever set foot on Europa (a moon of Jupiter). Nevertheless, in that entire thread, not one person jumps in to ask "Who cares" or the like.

One characteristic of humans (of all races) is that we tend to be curious. We see things, we ask questions, we get answers, and the answers lead us to new questions.

Of course, different people are curious about different things. That's why 678 DUers have viewed the thread about Europa, but many more haven't. This difference is no big deal. There's really no point to belittling people who are curious about things that don't happen to interest you. Save your ire for someone who posts along the lines of "Why are (members of particular racial group) so (unflattering description)?"