After all the things we've done to Iran.....the coup in '53, aiding Iraq in its attack on Iran (bio WMDs, chem WMDs, training), Stuxnet, sanctions....we owe them some peace.
More than that, we can't afford another war of aggression based on lies. The world won't tolerate it, we don't have the troops or money for it, and we would lose. Even the hardline Republicans should be able to add.
I suppose the average idiot doesn't know that we didn't pay anything for the 'first' Iraq war. And why? Because it was a truly multinational force that was motivated by facts and backed financially by leading countries of the world. When we fought a war of aggression based on fantasy--the same fantasy by the way that Israel and the Republicans are propagating today--we pay for it in our blood, military resources, and money. These are finite resources that cannot rot in the deserts in Iraq and Afghanistan for 10+ years and then used on one of the largest armies in the world without support.
The Iran agreements will give the world tangible proof that we need to motivate allies to strike Iran should they even come close to gaining nuclear weapons. This means that if Iran violates the agreement, which the GOP and warmongers say that they will, it will be a multinational force that responds, not just the USA and Israel. So IF the agreement is violated, the GOP gets the war Dick Cheney always wanted and we get to keep our skin.
Anyway, most of the stupidity from the warmongers comes from demonization, not reality.