Stephan:   Partly this shift in radio is a matter of fad and culture. This isn't the first time in American history there has been a virulent Right, and it won't be the last. But the culture wheel is moving on and, I think, there is also amongst the more rational right a dawning realization that what the extremists are proposing doesn't work. John Avlon's most recent book Wingnuts: How the Lunatic Fringe is Hijacking America is available now by Beast Books both on the Web and in paperback. He is also the author of Independent Nation: How Centrists Can Change American Politics and a CNN contributor. Previously, he served as chief speechwriter for New York City Mayor Rudy Giuliani and was a columnist and associate editor for The New York Sun.