ASPEN, Colo. — Former Israeli Ambassador to the U.S. Michael Herzog and other pro-Israel speakers received a warm reception from the crowd at the Aspen Security Forum this week, as they discussed continued efforts to free the hostages in Gaza and Israel’s strikes on Iran.

But Herzog told Jewish Insider, on the sidelines of the conference after his panel on Wednesday, that he’s been disappointed by the response to the strikes from Democratic lawmakers in Washington, which has been overwhelmingly negative.

It’s a response that also stands in contrast to Herzog’s description of the transition he observed in the Biden administration’s thinking on Iran: from pushing for a nuclear deal with Iran that Herzog said would have been weaker than the Obama-era Joint Comprehensive Plan of Action to, by the time President Joe Biden left office, active discussions of strikes on Iran.

“I must say, I was disappointed by the response of some senior people on the Democratic side,” Herzog told JI. “I’m saying it carefully because I never interfere in domestic politics here, but from a strategic point of view, I was disappointed by the response of some senior Democrats to the war on Iran.”

Herzog said that maintaining bipartisan support for Israel was the central goal of his ambassadorship and that he engaged with nearly everyone, including critics, with the exception of the most extreme voices. He said he expected U.S. leaders on both sides of the aisle to realize that the strikes offered a “unique opportunity” to counter a “malign actor” and “changed the strategic landscape in the Middle East.”

“People who either criticize it on procedural issues or people who say, ‘[It] wasn’t the right timing because they were talking to each other about a deal’ — there’s never a right time. Never,” Herzog said, emphasizing that the strikes had not, as critics warned, spiraled into a protracted war similar to Iraq or Afghanistan.

Herzog said Israel must “put a lot of work into maintaining that dialogue with both sides of the aisle, explaining our common interest, away from domestic politics here … and exploring the new opportunities that have been created in the Middle East.”

Herzog said that Israel has been preparing for an attack on Iran for decades, but the specific planning for what became Israel’s Operation Rising Lion and the U.S.’ Operation Midnight Hammer began in earnest in November 2024, after the second Iranian strike on Israel and Israel’s elimination of Iran’s air-defense systems. By that time, U.S. nuclear talks with Iran, which Herzog criticized as misguided, had been long stalled.

He said the fall of the Assad regime in Syria the following month provided a further opportunity to take action.

“If you look at the journey the Biden administration took from the initial days when they were rushing to a deal with Iran, to the last few months of the Biden administration where they were talking to us about military options against Iran, they went a long way,” Herzog recounted.

Herzog said he believes that the Biden administration underwent “disillusionment with the possibility of reaching a good deal with Iran,” as Iran made unrealistic demands, such as removing the Islamic Revolutionary Guard Corps’ terrorism designation. And he said Iran’s supply of weapons for Russia’s invasion of Ukraine made the talks “much more difficult.”

“I just could see that movement with time, to the last phase of Biden’s presidency, when, after we turned the tables on the Iranian axis and opened that huge opportunity, we actually started looking with them at the military option,” he said. “It was too late in the day [to carry out the strikes before Biden left office], but it was a very interesting journey that I noticed.”

Looking at the rising isolationist sentiments on the Republican side of the aisle, Herzog said he’s been monitoring the issue and has “been concerned about it,” but also argued that such voices aren’t dominant in the Trump administration’s decision-making.

“It’s like a swing of a pendulum because the U.S. ultimately decided to follow Israel and strike Iran, and this is really historic, in that it’s a first-of-its-kind coordinated offensive operation. … This is the first time that we are coordinated in our offensive operations, that’s a very big deal for a long time to come in my view,” Herzog said.

He said he sees the pendulum swinging against the isolationists in the administration’s recent moves to provide additional support to Ukraine and take a tougher stance toward Russia as well.

“So all in all, I don’t think that the administration is following this isolationist trend, but I do follow it and I am concerned about it,” Herzog said. “I do believe that the world needs American leadership, [an] American dominant role. The world needs America to be a force of good, as it has always been, and that’s what we’d like to see.”

Herzog — reflecting on the panel he spoke on, “Israel at a Crossroads” — said that the U.S. and Israel need to be closely coordinated and in lockstep on the path forward on Iran, including the limits of a diplomatic deal and the red lines that would prompt further military action to prevent Iran from rebuilding its nuclear program, as well as ways to capitalize on Iran’s weakness throughout the region and prevent it from rebuilding its proxy network.

“We managed to surprise the Iranians, hit all the main centers of gravity and take them completely off balance. But challenges are still ahead of us because we have to assume that Iran will seek to rebuild those threatening capabilities,” Herzog said. “We should not rest on our laurels.”

He also emphasized that the strikes and the degradation of Iran’s proxies had “created the conditions for a different Middle East.”

Asked about the Israeli government’s policy on Syria — which shifted in the span of a week, from Israeli Prime Minister Benjamin Netanyahu actively discussing normalization and diplomatic paths with President Donald Trump in the White House to Israel bombing key Syrian government sites in recent days — Herzog described the new Syria as a “mixed bag” with both risks and opportunities, and said that it may be too early to judge.

“On one hand, I believe that this new leader, Ahmad al-Sharaa, a.k.a. Mohammad al-Jolani, doesn’t want, he doesn’t seek war with Israel, and he sends across messages, and that’s what he told the Trump administration,” Herzog said, adding that Israel had started a dialogue through the U.S. on what Herzog termed a formal or informal non-aggression agreement and the demilitarization of southern Syria.

“On the other hand, we should not forget the background of al-Sharaa and the people surrounding him or subordinate to him,” Herzog said. “They all grew up in the school of jihadism.”

He criticized al-Sharaa for what he said was an effort to “subjugate [Syrian minorities] so they become part of his Syria, his vision of Syria” rather than allowing for a federalist system. Herzog said the Israeli strikes “sent a very strong message … that we will not tolerate the scenes of humiliating the Druze and endangering their lives,” and aimed to block the Syrian army from conquering Druze areas and carrying out atrocities.

“What we’ve seen, first with the Alawites and now with the Druze, is very troubling,” Herzog said. “We in Israel, our concerns are about, first, the security situation in southern Syria, and second about the state of minorities, especially the Druze, because not only are they close to our border, [but] because we have an important Druze community in Israel. They are our brothers in arms.”

He added that it’s unclear to what extent al-Sharaa himself is in control over Syrian government forces’ actions.

The Israeli ambassador also reflected on the ways that the Oct. 7, 2023, Hamas attacks on Israel seemingly activated a global wave of antisemitism.

“You’re hit hard, you’re bleeding, and all your enemies smell the blood and rise to hit you,” Herzog said. “That pertains to all of our enemies in the region, the Iranian axis, but also pertains to anti-Israel, antisemitic forces here in the U.S. and elsewhere.”

He said that Israel has “gone a long way” against its military adversaries in the Middle East, “really turned the tables on Iran and the Iranian axis” and “created the conditions for a different Middle East.”

“But,” he continued, “we still have a long way to go against these anti-Israel, antisemitic forces. That’s an open front.”