Sometimes you hear a discussion or debate in which the participants seem to be getting nowhere, don't understand the subject and can't see the obvious. A prime example of this is the illegal-immigration controversy, and the folks making lots of noise are on conservative talk radio. The conversations on the subject usually revolve around two main themes: The president has sold out his conservative base, and he is ignoring national security by allowing illegal aliens to swarm over the border. Tune in to any of the far-right talk shows, and you can hear variations on these two themes just about...