I'm not sure if I disagree with you, or if the exceptions prove the rule. There are some vocal right-wing commenters, but the community reacts rather badly to dissenting voices that are perceived as "fighty" or grinding an axe. I think also there's a certain attitude of inclusiveness that runs contrary to right-wing culture, and things go badly when such concerns are dismissed (for whatever reason, but anti-"PC"-just-plain-talk springs to mind).