That South Park Rebulicans book is a bit shit, to be fair, though its auther is a big Ian Penman and Paul Morely fan, and conversed with Penman when he was writing the great pawboy blog. Penman posted his email on the blog. Will try and find the post later on, anyway...
The idea that a Conservative film = a shit or evil film is obviously stupid.
I think Fulci made some great films that could be considered very conservative: for example, Lizard in a Woman's Skin.
Ghostbusters is my favorite film of all time, but I don't consider it conservative, particularly. Thinking about it, I suppose there's an anti-public sector, pro-private slant to the plot, but it was made by the Saturday Night Live crew, for goodness sake (somebody's coming!)...