Diplomatically, Obama has thrown up a screen of false progress in the talks with the Iranians and made it increasingly difficult for Israel to strike and withstand the inevitable worldwide criticism.
The alternative to passively permitting Iran to get the bomb is, in Obama's own words, unacceptable because it will pose a genuine existential threat not just Israel but also to the United States, it will turn the present balance of power in the Persian Gulf on its head leaving the United States impotent in the face of future Iranian aggression and choking a large part of the world's supply of oil, and it will certainly trigger a nuclear arms race in the region generating nuclear proliferation which poses yet another existential threat to the United States.
Rather than facilitating Israel's power to strike militarily or doing it himself, Obama has enabled Iran, handcuffed Israel, and deceived his own people.
Iran’s ability to choke off ( or rather, the desired effects of it ) the world’s and the USA’s supply of oil in the Persan Gulf has been parcallly nullified by America’s Oil fracking revolution.