The Washington Post should not have fired Dave Weigel for his leaked Journolist comments, period.
I'm really not sure whose credibility the Post was worried about. Respect for their reader's sensibilities? Some fidelity to a "non ideological" standard that just doesn't exist in this form of journalism? I work at the oldest of old media institutions, the Atlantic. I mean, there are literally bound copies of the magazine, cobwebs intact, within yards of the my office.
The Post deserves credit for hiring Weigel and top policy bloggers like Ezra Klein. It needs to figure out how to manage them in a way that corresponds to the reality of the journalism universe. Weigel was a GOOD journalist who wrote provocative, value-added pieces that allowed a lot of people to really understand the way the conservative movement worked. Sure, he had a point of view, and sure, he often angered his subjects, but they respected him because they knew were he was coming from and because he took them seriously enough to care.