John: Thank you for the plug. Claiborne's book is better than you might be given to believe, though one's religious background will certainly come into play in forming conclusions. His commitment to service seems utterly genuine, whatever one thinks of his political conclusions, which do tend to be unswervingly left-wing. The world is a better place for having him.
And doesn't it tell us something about the times in which we live that "radical Christian" denotes a benevolent pacifist like Claiborne, and radical Islamist denotes.... well, something else.