Talking to Alamnutjob, Assssad or Hugo Fata$$ (sorry I couldn't resist on a slow day at the office) is not the same as Chamberlain signing the Munich Agreement (or him sending Hailfax over to meet with Hitler and proclaim the Nazis are go people).
Appeasement is letting Hitler take Austria against that treaty and then sign the Munich Agreement allowing Hitler to take Sutterland from the Czechs and then allowing Hitler to steamroll the Czechs and take the whole country.
Obama is doing that! What he is doing is opening dialog between 2 countries with britter pasts. Alamnutjob is not a saint, in fact he is a nutjob, but Iran is no where as dangerous as Nazi Germany and its disingenious to suggest that they are.
The smartest thing we could do is start dialog with them directly.