Sigh! Physicists generally know ZILCH about high level politics and how governments function and about why wars start and why they are engaged in as they are and so forth and so on. One might as well listen to Obama's campaign coach instead, "Okay now sir, smile and then LIE and then smile some more!"
This post is primarily about the Iran nuke agreement and whether or not it is credible from a scientific standpoint, something these gentlemen are well qualified to discuss. In their judgment, it IS a decent agreement and they outline why some of the criticism is off-base (ok, just wrong). The politics of the issue should hinge on the substance of it, and whether or not it's workable. I trust you will take some time to read what they have to say.