I don’t think there’s a single more surefire way to draw attention to yourself than to claim that academia discriminates against conservatives.
As for the question of why there are more liberals than conservatives in academia–and note the op-ed conveniently leaves out economics and the enormous and growing business schools in this discussion–it’s about two things. First, studying the human past and present in depth tends to challenge the mythology about the world conservatives hold dear. I’ve known many a person who came to graduate school a conservative and came out a liberal. One includes a founder of this blog. It’s not because of some Clockwork Orange-style indoctrination. It’s because understanding the world tends to make people rethink their position. Studying the history of race, class, gender, sexuality, environment, etc., tends to do that. Given how strongly conservatives don’t want to have us study those subjects in high school or college, you can see why they would be chafing over having to deal with that in academia and worrying that studying these subjects creates liberal “bias,” i.e. a realistic understanding of society’s complexity.
Second, it’s that conservatives are unlikely to take low-paying jobs in professions that have no future. Chalk that up to conservatives being smarter than liberals I guess.
But the idea of there being an active liberal bias is ridiculous. Rather, it’s conservatives bringing politics into academic hiring by evidently wanting–dare I say it–a quota on conservatives in academic departments. I guess a professor’s politics are supposed to matter in hiring if it benefits right-wingers.