What makes him think this time will be any different than 1938?
Obama: We Finally Have An Iranian Nuclear Bomb In Our Time
I did see the Iranian President stating, emphatically, the following: We will continue enriching uranium; we will continue research and development (into nuclear bombs and more efficient centrifuges); we will put 1000 of our best centrifuges in our underground fortified nuke bunker at Fordo, but we promise we’ll use those centrifuges to spin things like industrial salts, not uranium, swearsies.
Obama is delivering them the bomb.
“Britain and France had to choose between war and dishonour. They chose dishonour. They will have war.”
— Winston Churchill, to Neville Chamberlain in the House of Commons after the Munich accords