I disagree with Dawkins on this.
A guy who goes around talking about creationism in public, and wants to be an astronomer, either lacks common sense or wants to use the university as a platform for ideology. Those are bad signs in a job candidate.
But of all the crazy things a potential employee could believe, religious beliefs are the most likely to coexist with professional competence. Religion is usually instilled in childhood and linked up with a child's first introduction to morality; people frequently compartmentalize religious beliefs and go on to develop genuine real-world skills. In other words, a religious belief tells you a lot about an individual's upbringing, a little about his character, and not much about his intellect. (Robert Aumann is everyone's favorite religious-but-brilliant guy around here; but the ranks of mathematicians, at least, are full of Orthodox Jews who do excellent work while holding lots of plainly false beliefs. And Ramanujan was a believing Hindu. It's not rare at all.)
By contrast, a belief that the earth is flat tells you nothing about the individual's upbringing and a whole lot about his character and intellect -- he wasn't under thousands of years of pressure to believe bullshit, he came up with it on his own.
Dawkins wants to bite the whole bullet and actively encourage employers to refuse to hire people who have ridiculous beliefs, on the grounds that one stupid belief indicates bad character or unfitness for the job. He believes in judging people holistically. But think about what that means if it's extended beyond religion. Is it professional behavior to reject job applicants for their politics? Is it smart to reject a job applicant because she believes the Singularity is coming, or believes in polyamory, or believes that humans should colonize space one day, or wants to be cryo-preserved?
Some employers already do judge the "whole person," and to a greater or lesser degree reject people for private beliefs and life choices that are tangiential to job performance. Some industries care much more about demonstrated competence and less about whether you're weird in private life. I have a guess as to which hiring style actually gets more able employees.
Is it smart to reject a job applicant because she believes ... in polyamory?
Definitely not! :)
http://www.boingboing.net/2011/01/24/should-employers-be.html