Is John Kerry really that stupid?

Is John Kerry really that deceitful or is he just plain stupid, or beyond just plain stupid?
Despite his sonorous delivery, John Kerry's recent challenge to opponents of his Iran negotiations to come up with a better deal contains fundamental flaws as to facts and logic. So I ask you, Is John Kerry as stupid as he sounds?  Lets face it, a bad deal is worse than no deal at all. For example, if a seller insists on a price greater than the value of the item being offered, it is better not to purchase that item. Secondly, "deal or no deal" implies a false limitation of alternatives. His opponents already have proposed the re-imposition of increasingly harsh economic sanctions as an alternative to caving into Iranian demands.
He can't he be deliberately deceitful and stupid as well... can he?   The answer is, yes he is as stupid as he sounds. And probably even more stupid.
The question is whether he is an active co-conspirator in this nefarious scheme or actually believes his own nonsense. I don't know which is worse.
But then again he’s brokering a deal with developing nuclear weapons with Iran with the USA's blessing.  So you figure it out!
When I first  heard Kerry's speech or should I say babble, all I could think of was that old phrase "Don't Piss on My Leg and Tell Me That It's Raining".