They can see such actions triggering a wider conflict spreading to the entire Middle East and the rest of the Arab world.
Such a maelstrom wouldn't further anyone's objectives, least of all Israel's. Iran's restless people, for the most part anxious to get rid of their theocratic dictatorship, would quickly close ranks with the regime.
A three-star with much recent experience in the Middle East says an Israeli strike could move the entire region in the wrong direction.
Iran can close the Strait of Hormuz, not just for a few hours, as the Israelis say, but long enough to drive oil prices into the stratosphere. An admiral with years of experience in the region at different times of his career said privately Iran can sow thousands of mines in an area that handles one-fifth of the world's daily oil requirements. They are below the surface and can be detonated by remote control as a warship sails over them. Iran's shore line, which covers the entire eastern side of the Persian Gulf, is pock-marked with concealed missile sites.
The Iranians would also use hundreds of small boats in a swarming configuration that U.S. warships are prepared to cope with -- but one or two are bound to get through a curtain of fire and punch a hole in the hull of a U.S. or NATO minesweeper.
Such a small boat in Aden harbor in October 2000 punctured the hull of the USS Cole, a $1 billion Arleigh Burke class destroyer, killing 17 sailors, and putting the warship out of service for 18 months with a $220 million repair bill. Cost of the operation to al-Qaida: $10,000 plus three volunteer suicide bombers.
The response of Israeli naysayers is that such tactics would hurt Iran far more than any of its intended targets. U.S. generals and admirals respond that the Iranian leadership wouldn't be averse to cutting off its nose to spite its face.
The Iranians can also absorb temporary belt-tightening far more readily than Western Europeans. And with gas at the pump suddenly selling at $10 to $15 a gallon, U.S. President Barack Obama's updated resume wouldn't look too appealing at the ballot box in November.
The arguments about whether Iran really wants a nuclear capability seem disconnected from reality. Pakistan's nuclear black marketer A.Q. Khan sold the ayatollahs nuclear secrets two decades ago. By all accounts, Tehran is very close to achieving deliverable nuclear payloads.
U.S. Navy 5th Fleet headquarters in Bahrain is vulnerable; two-thirds of its population is Shiite Muslim and rooting for Tehran in the current conflict.
The Iranian aviary is also well stocked with hawks and super hawks with distinguished plumage. Next week's White House meeting of Israel's Binyamin Netanyahu with Obama was preceded by an impressive fly-by of hawks, fearful of being ignored.
Former CIA Director Jim Woolsey told Newsmax's Ronald Kessler, the United States should keep its powder dry but "send five carrier battle groups (that's half the total number available) to the Indian Ocean with B-1s and B-52s and B-2s to Diego Garcia and go Teddy Roosevelt one better and don't just speak softly. Don't say a word and they'll get the idea."
When the balloon goes up, "this air power," says Woolsey, "should be prepared to take out their ability to close the Strait of Hormuz and to take out as much as one can of the ballistic missile program, the nuclear program, the training camps of the Quds Force, and everything related to the Revolutionary Guard."
At the same time, says Woolsey, the United States should "crack down finally, totally, and completely on the Iranian Central Bank, using all of the financial instrumentalities, including the Swiss system."
But leave the regular Iranian navy and army alone, Woolsey adds. And to Chairman of the Joint Chiefs of Staff Gen. Martin Dempsey who described Iran as a "rational actor," Woolsey says Iranian leaders are no different than Adolf Hitler.
Some of their leaders want to wipe Israel off the map and "start a war that would end the world."
President Mahmoud Ahmadinejad, explains Woolsey, "may be behaving quite rationally given that objective. … I would say that objective is stark raving mad."
Most Iran watchers in the intelligence community say that one Israeli or U.S. bomb on Iran would push Iran's youthful protesters right into the arms of the government they despise.
The former CIA chief also says that Islamist extremist penetration among moderate Muslims in U.S. mosques is the biggest single danger the United States faces, greater than communism ever was.
Woolsey gathers a stateside consensus when he says if Iran is allowed to develop a nuclear weapon, "you'll not have to wait a day before the Saudis, the Turks and the Egyptians are busily constructing reactors and, under the Nuclear Non-Proliferation Treaty, saying they have every right to enrich uranium, and thereby embark on a nuclear weapons program."
Former U.N. Ambassador John Bolton, a super hawk of more recent lineage, says it's bombs away now. "Military strikes against key points in the Iranian fuel cycle are necessary to head off a nuclear Iran," he said.
More important than his meeting with Obama is Netanyahu's speech to the annual AIPAC convention. The endorsement of the American Israel Public Affairs Committee, Washington's most powerful lobby, is tantamount to solid congressional approval.