Don’t trust the bearded men with the burning eyes, as they have long since passed beyond rational behavior, and the best you can expect are brief moments of politeness, but only as a tactical move.
These are rational tactical moves. Iran and Obama both want America to pay for Iran to build nukes, so they can kill the Jews as soon as possible. The rational move is for them to make an agreement that lifts the sanctions and gives Iran money in return for promises that will not be kept.