OK, so I can see how some people could be brainwashed to believe that PM Sharon is some kind of a bad person (guess what, when you are a general in a constantly fighting army, you are going to be responsible for people dying!), but Barak?
As for the original question, no, the UN does not deserve the Nobel Peace Prize. Besides, giving a Peace Prize a month after the worst terrorists attack(s) in the history of the world just doesn't sound right.
Pacifism only works if EVERYBODY practices it