From the many comments the blog has received, it's clear that Kerry's critics are, to put it mildly, obsessed about the Swift Boat controversy. You can also see this at the Republican convention, where delegates are wearing Band-Aids with Purple Hearts on them. This attention goes beyond the normal sort of "tear down your opponents credentials" that you see in campaigns, I think, because it runs so much against type. It would be like the Republicans nominating a candidate who served as a Peace Corps volunteer before running a homeless shelter for abused women.. It's a case of congnitive dissonance where a fact just doesn't fit with someone's strongly-held beliefs and, therefore, must be denied and discredited, anything but admit that a liberal Democrat served his country honorably and bravely. Democrats, of course, have their own forms of cognitive dissonance, like their insistence that Bush is an idiot, but the Republicans seem particularly crazed on this one.
By the way, to all the commenters who want flame me for suggesting that the SBVT'ers lack credibility, BRING IT ON!