But Netanyahu also said that Iran threatens many other countries apart from Israel, and so his mission over the next several months is to convince the world of the broad danger posed by Iran. One of his chief security advisers, Moshe Ya’alon, told me that a nuclear Iran could mean the end of American influence in the Middle East. “This is an existential threat for Israel, but it will be a blow for American interests, especially on the energy front. Who will dominate the oil in the region—Washington or Tehran?”

Netanyahu said he would support President Obama’s decision to engage Iran, so long as negotiations brought about a quick end to Iran’s nuclear ambitions. “How you achieve this goal is less important than achieving it,” he said, but he added that he was skeptical that Iran would respond positively to Obama’s appeals. In an hour-long conversation, held in the Knesset, Netanyahu tempered his aggressive rhetoric with an acknowledgement that nonmilitary pressure could yet work. “I think the Iranian economy is very weak, which makes Iran susceptible to sanctions that can be ratcheted up by a variety of means.” When I suggested that this statement contradicted his assertion that Iran, by its fanatic nature, is immune to pressure, Netanyahu smiled thinly and said, “Iran is a composite leadership, but in that composite leadership there are elements of wide-eyed fanaticism that do not exist right now in any other would-be nuclear power in the world. That’s what makes them so dangerous.”

He went on, “Since the dawn of the nuclear age, we have not had a fanatic regime that might put its zealotry above its self-interest. People say that they’ll behave like any other nuclear power. Can you take the risk? Can you assume that?”

Netanyahu offered Iran’s behavior during its eight-year war with Iraq as proof of Tehran’s penchant for irrational behavior. Iran “wasted over a million lives without batting an eyelash … It didn’t sear a terrible wound into the Iranian consciousness. It wasn’t Britain after World War I, lapsing into pacifism because of the great tragedy of a loss of a generation. You see nothing of the kind.”

He continued: “You see a country that glorifies blood and death, including its own self-immolation.” I asked Netanyahu if he believed Iran would risk its own nuclear annihilation at the hands of Israel or America. “I’m not going to get into that,” he said.

Neither Netanyahu nor his principal military advisers would suggest a deadline for American progress on the Iran nuclear program, though one aide said pointedly that Israeli time lines are now drawn in months, “not years.” These same military advisers told me that they believe Iran’s defenses remain penetrable, and that Israel would not necessarily need American approval to launch an attack. “The problem is not military capability, the problem is whether you have the stomach, the political will, to take action,” one of his advisers, who spoke on condition of anonymity, told me.