They look at it through very rose colored glasses.
Dean has bragged about lying to get out of military service.
He promotes mooreonic conspiracy theories.
He did not win one primary.
Many perceive him as deeply unstable.
OTH, he takes acceptable positions on some social issues, and as Gov. he was fairly moderate. He talks tough but he is for immediate pull out from Iraq. He seems, like Kerry, to be trapped in Vietnam as his foreign policy archetype. I don't think he will sit well for long with much of the DNC rank and file.
It will be interesting to see if he can pull it off, and not lead the DNC over the cliff.
Ed