Mike, a lot of self-selection goes on here. GCA has enough of a minimalist-type bent, it doesn't draw so many RTJ/Fazio enthusiasts.
I also point out, though, that the tastes on this site pretty well reflect those of the major golf mags, as shown in their ratings. i.e. while not many Fazios or RTJs appear in the world top 100 lists, a whole lot of Doak, C&C, MacKenzie, Old Tom etc. courses do. Without attempting a chicken/egg analysis, this site is tuned in to the 'experts,', such as they are.
Ben, I'm sure you are partly right about Fox News. But there's another reason as well. Until Fox came along, the conservatives had nowhere to turn. CBS, NBC, ABC, and CNN are strongly liberal. No surprise that a network taking the conservative view attracts more conservatives.
ETA: for those concerned about group think on this site, read John Percival's latest post in his Doonbeg thread. He just played Lahinch, HATED it, and gives a whole bunch of reasons why.