It is heartening to know that American Jewry cathects in Israel and evinces sincere concern for its well-being. In all fairness, many of those supporting the eristic agreement with Iran genuinely believe it is the best option to preserve Israel's safety and security in the years ahead.
Yet this surmise runs contrary to reason, and does not stand up to scrutiny. While it is true that you make peace with your enemies, not your friends, it is incomprehensible to do so while the enemy is still actively aggressing you and terrorizing your allies.
The Iranian regime continually equips and funds murderers of Jews, and threatens to this day a Holocaust sequel with nuclear special effects. They are already stocked with a veritable array of missiles capable of carrying multiple warheads and an increasingly byzantine system of installations to manufacture and amass atomic bombs.
Would they actually nuke Israel, especially if Israel has 200 nukes with which to return the favor? Raise your hand if you care to find out.
Look no further than Iran's modus operandi, since the late 1970s, of getting away with whatever they possibly can: although not conclusive, it is highly suggestive. Would you really risk a wait-and-see approach?
It ultimately makes little difference whether well-meaning exiles consider themselves more as American Jews (Jews who just happen to reside in the U.S.) than as Jewish Americans (U.S. residents who just happen to be Jewish). Everyone's identity composition varies, and people have every right to feel that, within their identity makeup, their American aspect dominates their Jewish aspect.
That said, those Jews publicly shilling for a deal considered by the majority of Israelis as detrimental to their lives and welfare are unwarranted and unhelpful. Will deal advocates forsake their deluxe lounges in Los Angeles or Washington to augment the insufficient oversight of Iran's nuclear program? Will deal underwriters assume liability should it become clear that - alas! - their bungling leaders and negotiators went haggling in good faith in the Persian bazaar only to be hoodwinked by underhanded hucksters? Real Israeli lives are at stake, and Israelis will understandably disdain even the most well-meaning yet outlying allies who unwittingly abet their planned annihilation.
The unsolicited slipslop of diasporic Jews comfortably accumbent in America, safely on the sidelines, has no bearing whatever on the homeland calculus of those embedded amid the arena. The least that exilic Jews can do for Israel is to refrain from unbidden announcements (mostly of their own pretentiousness); such individuals or groups only come across as servile menials deluded by adulation of their presidential incumbent, reflexively making obeisance before their statuesque maumet, O'Baal (though he be hocused by mortal ayatollahs).
In 591 BCE, the prophet and priest Yechezkel (Ezekiel) had a vision wherein he was plucked by a lock of his hair and transported from Babylonia to Jerusalem to witness obscene scenes of idolatry within the Sanctuary's precincts. Among the perfidious rites he beheld was the sun-worship in the inner court, where 25 Jewish men stood with their backs to the Temple edifice, facing east. They put branches to their noses, sniffing the scented Persian (Zoroastrian) barsom bundle of twigs made from leafless haoma vines and pomegranate shrubs. Though the land then was utterly rife with violence, these idolaters aromatized their nostrils so that everything to them smelled swell.
To the people and leadership of Israel, the deal with Iran fails the foolproof sniff test; it is perfumed filth, manure masquerading as lavender.
Thus, mutatis mutandis, the ancient question remains: Is it a light thing to Jewry to adduce acts odious and odorous, only to then mask the stench by inhaling pleasant fragrances?