In theatrical terms, Benjamin Netanyahu killed it. His performance was a virtuoso mix of skill and substance as he showered his audience with obligatory gratitude, yet offered absolute clarity on the stakes.

Whether Netanyahu actually killed it — whether he drove a stake through the emerging deal with Iran — depends on the Little Chamberlains of the Democratic Party. We know the Big Chamberlain, Barack Obama, is always eager for peace at any price. But the price just went up, and that could lead a few more Dems to break from the appeaser-in-chief.

If they fail, and if Iran gets the bomb, heaven help the world.

Netanyahu certainly did his part, as proven by the scores of Dem boycotters and the squealing from some who attended. Reports that Nancy Pelosi was “distressed” and “near tears” show he struck the nerve that needed to be struck.

That he did it in the American Capitol made the rebuke historic. Never before has a president been so outplayed on his own turf, but never before has a president so blatantly refused to do his duty.

Focusing on what he called the two main American concessions so far — allowing Iran to retain most of its infrastructure and a phase-out of restrictions — Netanyahu shredded both. The terms leave Iran with too many centrifuges enriching uranium and envision a day when Iran would be free of all restrictions and able to make as many nukes as it wants.

The only way to defend those terms is to say it’s the best deal possible and the alternative is immediate war. That is tantamount to accepting a nuclear-armed Iran, yet that’s exactly the argument Obama and John Kerry are making even as they deny that’s where they are headed. They’ve gotten away with the scam so far, but I suspect that turkey is no longer going to fly.

As the Israeli prime minister put it, “That’s why this deal is so bad. It doesn’t block Iran’s path to the bomb; it paves Iran’s path to the bomb.”

And, instead of war, he said the alternative is a better deal. He defined that as one “that doesn’t leave Iran with a vast nuclear infrastructure and such a short breakout time. A better deal that keeps the restrictions on Iran’s nuclear program in place until Iran’s aggression ends.”

Had that been all, it would have been enough. The no-nonsense leader of a unique ally had put forth a cogent, tidy argument designed to give Congress a reason to stop the talks before it’s too late, and a road map for how to get there.

But, thankfully, Netanyahu didn’t stop there. Offering a classic Mideast perspective of religion as the guiding force of history, he correctly called the Iranian regime a prime source of the Islamic fanaticism spreading across the globe. He cited the 1979 revolution led by Ayatollah Khomeini, who ordered his followers to “export the revolution throughout the world.”

Khomeini’s followers have obeyed, Netanyahu insisted, citing Iran’s long trail of terrorism that continues to this day and has taken the lives of many Americans. In rapid fashion, he talked of “Iran’s goons in Gaza, its lackeys in Lebanon, its Revolutionary Guards on the Golan Heights,” each controlling a border with Israel.

He went on: “Backed by Iran, Assad is slaughtering Syrians. Backed by Iran, Shiite militias are rampaging through Iraq. Backed by Iran, Houthis are seizing control of Yemen, threatening the strategic straits at the mouth of the Red Sea.”

This is the real world, unraveling before our eyes, and to see it clearly is to understand why Iran cannot be allowed to get the bomb. Its vow to destroy Israel and America must be taken seriously.

Look at the death and destruction it has caused already, and it defies common sense to believe Iran would be more peaceful with the bomb. Driven by the will to dominate, it cannot be trusted to restrain doomsday weapons.

Which brings us back to Obama. His willingness to grant Iran a soft deal is a malignant example of his refusal to accept the role of Islam in Islamic terrorism. As writer Fred Siegel recently scoffed, the president is insisting that he is an “expert on legitimate Islam” and “assuming his role as Defender of the Islamic Faith.”

Even if well-intentioned, these are not harmless mistakes. Obama’s rigid ideology and faith in his own powers of redemption are blinding him to the results. It is why he has been slow to confront both the Islamic State and the Islamic Republic.

Instead of recognizing his mistake, Obama complains about alarmist media accounts and warns that, because of the Crusades, Christians should be wary about getting on their “high horse” over Muslim atrocities.

All this is sophistry designed to deflect responsibility away from the Oval Office, even as it makes cataclysmic nuclear war more likely.

Obama’s refusal to face the truth and act accordingly makes him unfit to be president, but the immediate question is what to do NOW.

The answer, thanks to Netanyahu, is clear. It begins with Congress, backed by the American people, saying no to the nuclear deal and stiffening our national resolve to combat the evil of Islamic terrorism.

That is not the easy path, but it is the necessary one.