Ya’alon, a former army chief of staff who is slated to serve as Netanyahu’s minister for strategic threats, dismissed the possibility of a revitalized peace process, telling me that “jihadists” interpret compromise as weakness. He cited the reaction to Israel’s unilateral withdrawal from Gaza four years ago. “The mistake of disengagement from Gaza was that we thought like Westerners, that compromise would defuse a problem—but it just encouraged the problem,” he said. “The jihadists saw withdrawal as a defeat of the West … Now, what do you signal to them if you are ready to divide Jerusalem, or if you’re ready to withdraw to the 1967 lines? In this kind of conflict, your ability to stand and be determined is more important than your firepower.”

American administration sources tell me that President Obama won’t shy from pressuring Netanyahu on the Palestinian issue during his first visit to Washington as prime minister, which is scheduled for early May. But Netanyahu suggested that he and Obama already see eye-to-eye on such crucial issues as the threat posed by Hamas. “The Obama administration has recently said that Hamas has to first recognize Israel and cease the support of terror. That’s a very good definition. It says you have to cease being Hamas.”

When I noted that many in Washington doubt his commitment to curtailing Jewish settlement on the West Bank, he said, in reference to his previous term as prime minister, from 1996 to 1999, “I can only point to what I did as prime minister in the first round. I certainly didn’t build new settlements.”

Netanyahu will manage Israel’s relationship with Washington personally—his foreign minister, Avigdor Lieberman, of the anti-Arab Israel Beiteinu party, is deeply unpopular in Washington—and I asked him if he could foresee agreeing on a “grand bargain” with Obama, in which he would move forward on talks with the Palestinians in exchange for a robust American response to Iran’s nuclear program. He said: “We intend to move on the Palestinian track independent of what happens with Iran, and I hope the U.S. moves to stop Iran from gaining nuclear weapons regardless of what happens on the Palestinian track.”

In our conversation, Netanyahu gave his fullest public explication yet of why he believes President Obama must consider Iran’s nuclear ambitions to be his preeminent overseas challenge. “Why is this a hinge of history? Several bad results would emanate from this single development. First, Iran’s militant proxies would be able to fire rockets and engage in other terror activities while enjoying a nuclear umbrella. This raises the stakes of any confrontation that they’d force on Israel. Instead of being a local event, however painful, it becomes a global one. Second, this development would embolden Islamic militants far and wide, on many continents, who would believe that this is a providential sign, that this fanaticism is on the ultimate road to triumph.

“Third, they would be able to pose a real and credible threat to the supply of oil, to the overwhelming part of the world’s oil supply. Fourth, they may threaten to use these weapons or to give them to terrorist proxies of their own, or fabricate terror proxies. Finally, you’d create a great sea change in the balance of power in our area—nearly all the Arab regimes are dead-set opposed to Iran’s acquisition of nuclear weapons. They fervently hope, even if they don’t say it, that the U.S. will act to prevent this, that it will use its political, economic, and, if necessary, military power to prevent this from happening.”

If Iran acquires nuclear weapons, Netanyahu asserted, Washington’s Arab allies would drift into Iran’s orbit. “The only way I can explain what will happen to such regimes is to give you an example from the past of what happened to one staunch ally of the United States, and a great champion of peace, when another aggressive power loomed large. I’m referring to the late King Hussein [of Jordan] … who was an unequalled champion of peace. The same King Hussein in many ways subordinated his country to Saddam Hussein when Saddam invaded Kuwait in 1990. Saddam seemed all-powerful, unchallenged by the United States, and until the U.S. extracted Kuwait from Saddam’s gullet, King Hussein was very much in Iraq’s orbit. The minute that changed, the minute Saddam was defeated, King Hussein came back to the Western camp.”

One of Iran’s goals, Netanyahu said, is to convince the moderate Arab countries not to enter peace treaties with Israel. Finally, he said, several countries in Iran’s neighborhood might try to develop nuclear weapons of their own. “Iran’s acquisition of nuclear weapons could spark a nuclear arms race in the Middle East. The Middle East is incendiary enough, but with a nuclear arms race it will become a tinderbox,” he said.

Few in Netanyahu’s inner circle believe that Iran has any short-term plans to drop a nuclear weapon on Tel Aviv, should it find a means to deliver it. The first-stage Iranian goal, in the understanding of Netanyahu and his advisers, is to frighten Israel’s most talented citizens into leaving their country.  “The idea is to keep attacking the Israelis on a daily basis, to weaken the willingness of the Jewish people to hold on to their homeland,” Moshe Ya’alon said. “The idea is to make a place that is supposed to be a safe haven for Jews unattractive for them. They are waging a war of attrition.”

The Israeli threat to strike Iran militarily if the West fails to stop the nuclear program may, of course, be a tremendous bluff. After all, such threats may just be aimed at motivating President Obama and others to grapple urgently with the problem. But Netanyahu and his advisers seem to believe sincerely that Israel would have difficulty surviving in a Middle East dominated by a nuclear Iran. And they are men predisposed to action; many, like Netanyahu, are former commandos.

As I waited in the Knesset cafeteria to see Netanyahu, I opened a book he edited of his late brother’s letters. Yoni Netanyahu, a commando leader, was killed in 1976 during the Israeli raid on Entebbe, and his family organized his letters in a book they titled Self-Portrait of a Hero. In one letter, Yoni wrote to his teenage brother, then living in America, who had apparently been in a fight after someone directed an anti-Semitic remark at him. “I see … that you had to release the surplus energy you stored up during the summer,” Yoni wrote. “There’s nothing wrong with that. But it’s too bad you sprained a finger in the process. In my opinion, there’s nothing wrong with a good fist fight; on the contrary, if you’re young and you’re not seriously hurt, it won’t do you real harm. Remember what I told you? He who delivers the first blow, wins.”