Is Alexander seriously comparing this to him taking 50 hostages and then killing 10 people? And this is the same Alexander who helps CIA kill that many people per day with his mass surveillance and "signature drone strikes" - right? Just checking to see if he's the right guy to question Snowden's morals.
Alexander is saying "He's already committed a crime and is promising to do another. How do we give him a free pass on the first crime if he promises not to do the second?"