The decertification of the Joint Comprehensive Plan of Action (JCPOA) by Trump is most unfortunate. It seems that Trump was not swayed by either France's President Macron or Germany's Chancellor Merkel to preserve the deal. Instead, he appears to have taken Israeli Prime Minister Netanyahu's advice to decertify the deal, even though Iran continues to fully adhere to all of its provisions. It is dangerous that neither Trump nor Netanyahu appears to fully grasp the dire regional and international implications of the unilateral decertification of the deal by the US.
In January, Trump gave Britain, France, and Germany an unrealistic deadline -- May 12 -- to fix what he considers the deal's defects, including the sunset clauses under which some of the terms expire, Iran's ballistic missiles program (which was not part of the deal), and the monitoring of suspected Iranian nuclear sites. This was mission impossible without the support of Russia and China, not to speak of the short period of time.
Netanyahu's public stunt, displaying thousands of documents to provide further proof that Iran has been conducting a secret nuclear weapons program, is not new. His claim that the Iran deal was based on information that was not known before does not justify the decertification of the deal, especially because Iran has been fully adhering to all the provisions of the deal.
The fact that Iran was pursuing a nuclear weapons program was the main reason behind President Obama's effort to strike the deal. As EU foreign policy chief Federica Mogherini said in Brussels, "the deal was put in place exactly because there was no trust between the parties..." Secretary of Defense Mattis echoed precisely the same sentiment, adding that "the verification [procedure]... is actually pretty robust as far as our intrusive ability to get in."
The deal is certainly far from perfect, but withdrawing from it and starting from scratch may be impossible, especially in light of Iran's vehement refusal to modify the deal, as was expressed by Foreign Minister Zarif: "we will neither outsource our security nor will we renegotiate or add onto a deal we have already implemented in good faith."
The decertification of the deal will force Iran to choose one of two options. The first is to exploit the division between the US and the other signatories. In this case, Tehran could continue to adhere to the provisions of the deal, even though Iran will still suffer from unilateral (but not as severe) American sanctions. Under US law, Trump must wait at least 180 days before imposing their most severe consequences, which includes targeting banks of countries that fail to appreciably cut their oil purchases from Iran.
The second option for Iran is to withdraw from the deal altogether, restart its nuclear weapons program, and potentially even withdraw from the Non-Proliferation Treaty (NPT) to prevent the monitoring of its nuclear program by the IAEA, which is the worst thing for Israel and other American allies in the region.
The severe disadvantages of decertification
First, most observers agree that Iran would resume its nuclear weapons program, which could quickly lead to the proliferation of nuclear weapons in the Middle East. This would also increase regional tension and a growing sense of insecurity by other countries in the area, which is a recipe for sparking new and further intensifying current violent conflicts.
Second, given the intense enmity between Israel and Iran, the Israeli government might well decide to preemptively attack Iran's nuclear facilities before Tehran reaches the breakout point. This would more than likely lead to an Iranian-Israeli war and pull other countries, including the US, into the fray, which could have dreadful consequences throughout the Middle East.
Third, such development would also deepen Iran's resolve to further entrench itself in Syria, which is precisely what Israel wants to avoid. This too will prompt Israel, as it has done in the past, to attack Iranian military installations in Syria, which could also escalate into a regional conflagration.
Fourth, Iran will have every reason to accelerate its ballistic missile program, which poses a greater danger not only to Israel but to the US' allies throughout the region. In addition, Iran will have further incentive to increase its financial support of extremist groups to destabilize the region, which it has and will continue to exploit.
Fifth, the unilateral withdrawal from the deal by the US will undoubtedly create a schism with the US' allies as well as Russia and China and could foreclose any opening to modify the deal, which Trump failed to consider.
Finally, the US' credibility will be seriously tarnished with both friends and nemeses, especially at this juncture when the US is preparing to work out a deal on denuclearization with North Korea's Chairman Kim Jong Un, who would be given a legitimate reason to doubt any American commitment to adhere to future agreements.