I don't think it's overstatement to say that Obama successfully has isolated Israeli Prime Minister Benjamin Netanyahu by bringing the major world powers plus Germany into an Iran nuclear agreement publicly opposed by Netanyahu (and quietly by many Arab countries).
The perennial thorn in Obama's Mideast side stands almost alone in publicly opposing the deal. The agreement helps keep the Mullahs in power through removal of sanctions while normalizing Iranian uranium enrichment. More than that, the statements accompanying the deal announcement treat Iran as the regional power to resolve a host of issues, including Syria.
In exchange, Iran agrees to slight compromises that push back the "breakout" period to produce a nuclear weapon by a few weeks or months at most.
Jeffrey Goldberg assesses Israel's isolation,
In Iran, Obama Achieves 50 Percent of His Goals:
U.S. President Barack Obama has had two overarching goals in the Iran crisis. The first was to stop the Iranian regime from gaining possession of a nuclear weapon. The second was to prevent Israel from attacking Iran’s nuclear facilities.
This weekend, the president achieved one of these goals. He boxed-in Israeli Prime Minister Benjamin Netanyahu so comprehensively that it's unimaginable Israel will strike Iran in the foreseeable future. Netanyahu had his best chance to attack in 2010 and 2011, and he missed it. He came close but was swayed by Obama’s demand that he keep his planes parked. It would be a foolhardy act -- one that could turn Israel into a true pariah state, and bring about the collapse of sanctions and possible war in the Middle East -- if Israel were to attack Iran now, in the middle of negotiations.
I think it's much broader than forestalling an Israeli attack.