I was musing this question a few weeks ago. Dawkins, Krauss, etc, they literally preach atheism under the guise of science. Not only is this "scientism" (yes it's a valid term, check if you don't believe me) but preaching atheism is also not a very "atheist" thing to do. So, why then, do they do it?
Hamza Tzortzis and Subboor Ahmad from iERA, give us some insight!!