The experiences of graduate students at a given school are usually quite different than the experiences of undergrads. Grad students are usually a lot more removed from the nuttiness that goes on in some places, and often are just completely different types of people than the typical undergrads. So when choosing a graduate school, the political, social, and religious climate of a university is not usually a top consideration. It should be for choosing an undergraduate school, however, and some of these schools sound just atrocious. But there are many good conservative schools out there and schools that are becoming more conservative - see my tagline for my personal recommendation in this area.
These trends are typically muted in the hard sciences, especially at the grad school level. Also depends on how long ago your friend finished his D. After all, these liberal whorehouses weren't always like this.