I don't say this because I think he's a bad person. He just hasn't done anything to materially advance the cause of peace. His ideas and leadership may be good, but there's been no accomplishment yet.
He would have gained a great deal of respect and good will if he'd politely and sincerely declined the award, and defused some of the negative rhetoric against him. If the award is indeed a high honor, it deserves the respect of being given, and accepted, in the spirit in which it was created.