Obama's race is irrelevant, he is a very charismatic and thoughtful candidate. He seems to have the spark of greatness to him which I think is what makes this good enough to cross to hacker news. A lot of successful entrepreneurs also have great charisma.
If Obama matters to you, you'd better start thinking about his race, since it's been his obsession for decades.
Edit: and don't forget his scary church: http://www.tucc.org/about.htm . It's as bad as Romney's church was thirty years ago.
Meanwhile, intelligent black people have to think about their race in no small part because some douchebags (http://news.ycombinator.com/item?id=88082) still hold discriminatory viewpoints against people due to their race. It's a shame it's that way, but there's documentary evidence that this sort of discrimination still exists.
Those 'douchebags' have been pretty well marginalized. Nobody talks about those data when creating race-sensitive laws or corporate policies. I mean, a Nobel Prize-winning geneticist got fired over mentioning that information offhand. It's hardly mainstream if one of the preeminent scientists of the last century can't even afford to speculate about whether or not it might be true.