This should be common knowledge. If only one side of a negotiation wants a deal, then he/she is going to pay dearly. There's even a joke about it: If you want it badly, you'll get it badly.
This brings us to Kerry and Obama's excellent adventure. While they pursue a deal which they hope will delay for a while Iran's development of a nuclear bomb, Iran is already flexing its muscles and generally thumbing its nose at the U.S.
See Revolution Day 2015 In Iran: A Regime-Organized Display Of Hatred For U.S., Obama for photos showing Obama hanged in effigy or sporting a Pinocchio nose. And no middle eastern political holiday would be complete without burning a few U.S. flags. (Via foxnews.com/).
Dude, that was a long time ago -- like a week.
For something more current, see Fake US aircraft carrier the target in latest Iranian drills.
How will those negotiating tactics work? It looks like Iran will probably get what it wants and would probably have gotten it even without the muscle flexing. Because: smart diplomacy.