The Christian Science Monitor suggests the answer is not clear cut.
An overview of Israel’s strategic doctrine authored by its military chief of staff, and the first ever made public, barely mentions Iran or its nuclear program.
Mr. Netanyahu portrays Iran’s nuclear program as an existential threat to Israel and is lobbying US lawmakers to block the deal. But after the agreement was announced in Switzerland last month, some former military officers endorsed it, saying it postponed the nuclear threat for another decade.
Now, in a fresh sign of a debate, the Israel Defense Forces has made public a 33-page overview of its strategic doctrine that raised eyebrows in Israel last week for barely mentioning Iran or its nuclear program.
Entitled simply, “IDF Strategy,” and authored by the chief of staff, Lt. Gen Gadi Eisenkot, the paper is a dry, dispassionate assessment of changing threats, military goals, and guiding principles for warfare. It marks the first time the army has ever released such a report to the public.
This should be evidence enough that the Iran deal is not as bad as the Republicans would have Americans believe but I expect their mischaracterizations will overwhelm facts presented dispassionately by Israeli military people. When Donald Trump is the vanguard of Republican thinking, facts appear to matter less than style. The style of Republicans is to smear the President as an anti-Semite (see Ben Carson) and naive in foreign policy.
Haaretz has coverage, too.
Hezbollah and Hamas are most immediate threats to Israeli security, according to strategic document issued by IDF Chief of Staff Gadi Eisenkot that outlines army plans for next five years.
[Israel Defense Forces Chief of Staff Gadi] Eizenkot formulated the IDF Strategy document with the assistance of a team of officers he established in the Operations Branch. A secret version of the document was given to the top brass last month. An unclassified version, with sensitive operational and political details filtered out, was then prepared. That document is important as a binding military concept influenced by the emphases of the current chief of staff, because of its public nature, and as a kind of bond that Eizenkot will have to make good on in the coming conflicts until the end of his term.
As a graduate of the U.S. Army War College, Eizenkot brings to the IDF the dimension of “national military strategy” of the chairman of the U.S. Army Joint Chiefs of Staff at the Pentagon….
Iran is mentioned as supporting Hezbollah and Hamas, not as a nuclear threat. Against “countries without a common border” with Israel, Eizenkot foresees “ongoing, multidisciplinary action,” the purpose of which is “a tangible, limited achievement to deter escalation,” whose main components are intelligence, air action, special forces and other security agencies such as the Mossad.
My emphasis is added there. If the Israel Defense Forces do not see Iran as a nuclear threat, why should Republicans? Because it suits their style. Which is to malign the President for political gain.