In a strikingly undiplomatic intervention that has laid bare the deepening rift between Washington and Jerusalem, US Vice President JD Vance on Thursday publicly castigated senior Israeli ministers for their opposition to the Trump administration’s memorandum of understanding with Iran. Speaking from the White House podium, Vance declared that Donald Trump is “the only head of state in the entire world who is sympathetic to the nation of Israel at this moment in time” and suggested that members of Benjamin Netanyahu’s cabinet were recklessly attacking “the only powerful ally that I have anywhere left in the entire world.” The vice-president’s remarks, amplified by an interview with The New York Times in which he described a “weird panic” and “freakout” in the Israeli system, represent what analysts in Washington and London are calling the most hostile public exchange between the two allies in decades.

Viewed from Jerusalem, the source of the friction is the interim agreement signed this week to end the nearly four-month war with Iran. Israeli officials across the political spectrum have voiced deep unease that the deal fails to address Tehran’s ballistic missile programme or provide a clear path for dismantling its nuclear infrastructure, while simultaneously constraining Israel’s military operations against Hezbollah in southern Lebanon. Netanyahu himself has refrained from directly criticising Trump, but his government has published an expanded map of its security zone in Lebanon and insisted troops will remain “as long as Israel’s security needs require it.” Far-right National Security Minister Itamar Ben-Gvir, whom Vance named directly, responded by posting an image of the vice-president on social media and equating Iran to “the Nazis of the 21st century,” arguing the United States ought to deal with them as it did with the Nazis of the 20th century.

Beyond the immediate US-Israeli spat, the deal has unsettled other regional actors. Gulf officials, speaking privately, have expressed “complete disappointment” that the memorandum places no limits on Iran’s drone and missile capabilities while offering Tehran sanctions relief, frozen assets, and a potential $300 billion reconstruction fund. From Tehran, Supreme Leader Ayatollah Mojtaba Khamenei framed the agreement as a sign of American “desperation,” even as Iranian state media celebrated the reopening of the Strait of Hormuz and the lifting of the naval blockade. Trump himself has added to the sense of disarray, publicly chastising Israel for high civilian casualties in Beirut and reportedly describing Netanyahu in private as “crazy,” even while insisting his administration has done more for the Jewish state than any other.

The episode marks a dramatic departure from the choreographed unity that characterised the joint US-Israeli military campaign launched in late February. Historians of the alliance recall Secretary of State James Baker’s 1990 rebuke—“When you’re serious about peace, call us”—as the nearest precedent, but note that Vance’s broadside was delivered with far greater personal venom and at a moment of active military coordination. With a 60-day negotiation clock now ticking towards a final settlement, the open acrimony raises fundamental questions about whether Washington can simultaneously broker a durable regional architecture and manage an ally that views the terms as an existential betrayal. The coming weeks in Geneva will test not only Iran’s willingness to verifiably change its behaviour, but also the resilience of a partnership that has long been the cornerstone of American strategy in the Middle East.