Dean thought building an organization in Iowa meant importing volunteers from other states. Iowans think building an organization in Iowa means getting actual Iowans on board with you.
If some kid with a pierced nose from San Francisco showed up on my doorstep asking me to vote for somebody I'd be more inclined to vote against that candidate! I'd love to hear from some actual Iowans, but I'm betting there's a bit of a culture clash between the Deaniacs and real Iowans.