I think it's worth imagining a certain scenario. Imagine the Democrats do rally around Obama. Imagine the media invests as heavily in him as I think we all know they will if he's the nominee -- and then imagine he loses. I seriously think certain segments of American political life will become completely unhinged. I can imagine the fear of this social unraveling actually aiding Obama enormously in 2008.
Translation: if Obama becomes the Democratic candidate for president and loses in 2008, blacks will riot (because blacks are unruly, savage beasts, dontcha know). Fear of black people becoming violent is therefore going to cause some people who normally would never consider it to
Be sure to follow the link; Greenwald's third update has screenshots of some of the commenters at these conservative blogs eschewing Goldberg's indirectness and his coded language in favor of being as blatantly racist as they can.