I'm all for free markets, but this story looks really quite bothersome. Colorado Christian University didn't renew the contract of Andrew Paquin because he didn't seem supportive enough of the university's revised mission, one that included a commitment to free markets. Apparently, he had the temerity to assign in class works by Peter Singer and Jim Wallis. Both of those guys are deeply wrong in their policy prescriptions (and, at least with Singer, his fundamental moral claims) but a student who is taking a class on views of economic justice and the like ought to be acquainted with their views. Dumb, dumb, dumb.
But just to be fair, though, it might be worth noting that someone who was teaching in your typical liberal arts college and assigned works by, say, Milton Friedman and Thomas Sowell (and taught in a way that made it clear he agreed with them), he would certainly be in grave danger of not securing tenure. But inasmuch as we think that unfair (and we should) so too should we think this.