Maybe I'm just a bit too Catholic, but Rosenbaum's argument justifying guilt, and why it's a good thing, totally convinces me (though I'm less convinced that that provides a valid reason to support Obama). The entire article is worth the click over, but here are some highlights:
Guilt is good, people! The only people who don't suffer guilt are sociopaths and serial killers. Guilt means you have a conscience. You have self-awareness, you have—in the case of America's history of racism—historical awareness. Just because things have gotten better in the present doesn't mean we can erase racism from our past or ignore its enduring legacy.
Actually, I think it requires a kind of strength, not weakness, to face the ugly truths of history and to react to them in an honest way. "Liberal guilt" isn't a reason one must automatically support a black candidate, but that doesn't mean that liberal guilt—better defined as an awareness of the need to contend with, and overcome, a racist past—shouldn't be a factor in politics.
Of course, it's not enough just to feel guilty or to act on guilt alone. But guilt can often spur us to deal with the enduring consequences of the injustices of the past and force us not to pretend there are none.
It's especially surprising to hear "guilt" being disparaged by conservatives, since they present themselves as moralists; they are quick to decry liberals for seeking to abolish guilt over various practices conservatives deem immoral. But was slavery not immoral? For those conservatives who make a fetish of "values": Was not the century of institutionalized racism and segregation that followed the end of slavery a perpetuation of "flawed values" that the nation should feel an enduring guilt over? For those conservatives who are forever speaking of the way they value history and memory more than liberals: Should we abolish the history and memory of slavery and racism just because they're no longer legally institutionalized?
Again, to love America truly, one has to love the America that is and was, not a fantasy America free from flaws.