Sadly, I do not believe Fitzgerald is anything more than he seems to be....an opportunist who is willing to destroy lives of Libby and his family without regret or remorse.
I think Libby is collateral damage in a scheme to bring down the current government. Libby just happened to present a target of opportunity in this round of the game, imo.
He knows the game, and has played it a bit himself. (Se Mark Rich.)
They are all locked in life and death struggles and know what monsters they unleash upon themselves when they submit their applications for White House jobs.
I wonder what kind of people will be interested in those jobs in 10 or 20 years.... How sad. :-(