There are a lot of intelligent and well meaning people that blog at Kos, there are also a lot of Kossacks that support Dr. Paul. A decent portion of the moderation there is trying to squelch overtly pro_Paul diaries and comments.
Moulitsas is trying to hold it together and maintain some form of democratic coalition, but the freedom message crosses all boundaries.
Arch-partisans from both the left and the right are making an appeal to "party over principle" but it's a losing proposition. The more desperate their arguments become the more transparent they become as well.
Watching some of the "me too" democrats parrot the talking points he outlined shortly after the November 5th money bomb has started to drive many of the more principled posters away. Many of these guys are smart enough to do their own research and as a result, their own thinking.
There is no need to fear desperation. Celebrate it.