"... what his activities as a Community Organizer really entailed." Evidently Doug does know, but doesn't want to reveal the answer. Could it be he actually just doesn't want to reveal his source, since it might prove less than objective?

Much better to make a nebulous smear and run. Perhaps he's been taking lessons in smearing from the CEO of Smears R Us. Or perhaps he could teach the course.

It is certainly interesting that though he objects to the facts as presented in the Rolling Stone article--an article with copious quotes from McCain acquaintances-- he has none of his own to present. Does tend to undercut his argument just a bit.