That the Left is obsessed with the topic of race is hardly in dispute. Jonah Goldberg mentions this after he fielded some questions from callers on a C-SPAN interview..
"Speaking of those callers, I must say that the more I think about it, the more revealing they were. I haven’t counted or anything, but it seems to me that a plurality of the lefty callers were simply obsessed with race. I suspect that one or two of them were professionally invested in the topic (the guy who plugged FAIR and Media Matters smelled like a seminar caller to me). Regardless, it was fascinating how so many of them simply needed me/conservatives/National Review/Sean Hannity/et al. to be racists. It’s a small example of how so many liberals ground their identities in race and can’t conceive of the idea that their ideological opponents aren’t racists."
Indeed. As to why they "ground their identities in race", I came across two examples that explore the 'why' of the whole situation. First a helpful, explanatory quote from Ann Coulter...
"If it were true that conservatives were racist, sexist, homophobic, fascist, stupid, inflexible, angry, and self-righteous, shouldn't their arguments be easy to deconstruct? Someone who is making a point out of anger, ideology, inflexibility, or resentment would presumably construct a flimsy argument. So why can't the argument itself be dismembered rather than the speaker's personal style or hidden motives? Why the evasions?"
"With their infernal racial set-asides, racial quotas, and race norming, liberals share many of the Klan's premises. The Klan sees the world in terms of race and ethnicity. So do liberals! Indeed, liberals and white supremacists are the only people left in America who are neurotically obsessed with race. Conservatives champion a color-blind society."
Perhaps most telling is the explanation offered by Representative Allen West, with which I whole-heartedly agree. (He's just much more articulate about it than I am :-)
"Liberal Racism does not believe in One Nation under God. They believe in a Nation of subjects organized into collective groups under which they shall rule, not govern, in a secular humanist based society.
Indivisible, Liberal Racism does not believe in "e pluribus unim", they prefer a balkanized America where they can pit us against each other through their manipulated messages....such as Tea Party racism.
Liberal racism does not believe in Liberty and Justice for All, they believe in freedom defined by a ruling class elite while creating more victims who become dependent upon their dishonest benevolence."
So there you have it. In a nutshell, the Left is obsessed with race because...
A. Their arguments aren't nearly as good, so why not change the topic to an accusation of racism? And,
B. It's part of an overall strategy to pit different groups against one another, impede any progress toward racial indifference, harmony and acceptance and create strife at every turn in order to create various sub-categories of victims.
There. That was easy!