This will be brief. I have received a reply from my base Comm Officer concerning the blockage. As I thought, it was not a local block, per se, for blatant partisan purposes but rather a central block originating from the USAFR NOC (Network Operations Center).
It appears to be a simple combination of the Powers that Be in the USAFR making a stupid decision to simply put a generic block on "profanity"-tagged sites AND SmartFilter categorizing DKos with the "profanity" label. The Comm Officer told me that all he can do is pass on a request to SmartFilter to modify the category for the site and hope that they make the change. Otherwise, simply because of a policy to block "profanity", the site will be blocked.
Leave it to the Dominionists and other assorted religious whacks that have infested the Air Force over the last half-decade or so to see the need to protect the "adults" in the military from harmful reality.
For the moment, it appears that there is NO partisan conspiracy at work, just asshatedness (on the part of SmartFilter and the USAFR NOC).