I really enjoyed the other two movies by the director of Election (I wasn't offended, just bored--ditto The Snoring Game). About Schmidt and Sideways were very entertaining, though of course the latter had a ridiculous, blatant Bush-bash in it. But I just chuckle at how stupid these people are and move on. So to speak.
As for the liberalism of movie makers, my personal belief is that it's truly funny to hear all these liberal sentiments, these lessons on how to live with our fellow man, coming from people who live in gated communities with personal security details.