If the great powers (P5+1) were serious about implementing the JCPOA, then should the snapback sanctions mechanism of the JCPOA already have long since been implemented. The truth unfortunately, is that the great powers all fear Iranian mass terrorism by the long arm of Iranian intelligence (including Hezbollah worldwide), potentially with chemical, biological and radiological weapons of mass destruction. Worldwide Iranian mass terror deterrence works and there is no risk of Iran being subjected to snapback sanctions as indeed prescribed in the JCPOA itself. Iran is in practice completely free to accelerate its nuclear weapons program without restrictions or inspections of any kind and no one except Israel will move to strategically degrade the Iranian nuclear weapons program.
While nuclear proliferation is quite obviously a global problem and Iran is a global menace with global ambitions for ultimately global domination; it is ultimately only Israel that stands in the way of Iran’s ambitions to develop nuclear weapons. The so-called “international community” is however from a narrow point of view of individual national interest understandably quite keen on not suffering retribution for the upcoming Israeli strategic degradation of the Iranian nuclear weapons program.
The only thing that has substantially changed since the Holocaust in terms of the so-called “international community” vis-a-vis the Jews is that there is now a vibrant and powerful independent Jewish state standing in the way of those seeking to once more commit genocide against the ancient-modern Jewish nation.