"The best of both are the "true believers" -- those who are committed philosophically to whichever side they practice on."

No, the best are not committed to one side, they are committed to the system. The Prosecutors who scare me the most the ones who actually believe that they represent good and I represent evil. The world doesn't work that way. There truly are few people who are pure good or pure evil. The world is full of shades of gray and the people who can only see black white miss most of it.