How blind to beliefs should employers be?

Richard Dawkins: “My colleague takes the view that this [young-earth creationist] is entitled to a job as a professor of astronomy, because he keeps his private beliefs to himself while at work. I take the opposite view. I would object to employing him, on the grounds that his research papers, and his lectures to students, are filled with what he personally believes to be falsehoods. He is a fake, a fraud, a charlatan, drawing a salary for a job that could have gone to an honest astronomer. Moreover, I would regard his equanimity in holding two diametrically opposing views simultaneously in his head as a revealing indicator that there is something wrong with his head.”