Those who think "the best deal" over "what's best for the planet as a whole" are not global thinkers. They are nationalists, and nationalism is not the philosophy that will allow us to prosper globally. Virtually all of our allies exhorted Trump not to destroy this agreement, but he of course did. After all, Obama signed onto that, and they are dedicated to destroying out of pure hatred every single thing he ever did.
Iran is a relatively developed country that's important to regional stability and trade, but we are about to make a deal with North Korea, a secretive hellhole with only 1/9 Iran's per capita GDP. Is this a joke?
If Obama had made a deal with North Korea but not Iran, Trump would be renouncing Obama's N.K. deal and possibly embracing Iran. He's babbled on and on about the many barrels full of U.S. banknotes that Obama "gave" to Iran. Does he expect to get those barrels back? Does he think The Trump Organization should get a cut if he does?
Trump has threatened sanctions against Airbus if they fulfill their contracts with Iran. Is Europe giving any thought to sanctions against Boeing. Trump, Bolton and cohorts seem to want a war with Iran in a big way. War is fantastic for rich people; arms dealers, big oil, etc. Get ready for $3 plus at the pump in very short order.
One legacy of the Trump administration that seems increasingly likely, is that the United States will be a much more politically isolated country. And we'll probably be more economically isolated as a result as well. Not only do I struggle to see how we benefit from this outcome, but I struggle to see how we don't lose something in the process. To the Trump administration, being isolated is a feature, not a bug. No, it doesn't make sense economically, or militarily, or from a world stability standpoint, not even from an american stability standpoint. It does make sense if you want to "take america back" to the social and national identities that people think that we had in the 50's