I actually made the Benedict Arnold comparison myself a few days ago.
Peter Arnett doesn't rise to the level of a Benedict Arnold. Arnold after all was a true combat hero before becoming a traitor. Arnett has always been a weasel.
Geraldo was just being a fool, not malicious, at least IMHO.
Geralso had to have been give strict instructions on procedures of war as to what was
reportable and what was not. He deliberately chose to disregard military procedures.
Geraldo knowingly jeopardized soldiers who were already in harm's way by exposing their
positions and attack strategies.
You might characterize that as merely being foolish. I do not.