Many of the same people who were telling us what a cakewalk invading Iraq would be are now lobbying to bomb Iran. They assure us it would be another cakewalk which would restore American prestige around the world. Indeed, North Korea and other rogue states would come groveling.

Right.

But an unusual opponent of launching another war has emerged. Reports the Jerusalem Post:

There is no viable military option for dealing the Iranian nuclear threat, and efforts by the Israeli government and its supporters to link that threat to progress in peace with the Palestinians and Syria are “nonsense” and an obstacle to the Arab-Israeli and international cooperation essential to changing Iranian behavior.

That’s the conclusion of Keith Weissman, the Iran expert formerly at the American Israel Public Affairs Committee (AIPAC), speaking publicly for the first time since the government dropped espionage charges against him and his colleague, Steve Rosen, earlier this month.

There’s no assurance an attack on Iran’s nuclear facilities — even if all of them could be located — would be anything more than a temporary setback, Weissman told me. Instead, a military strike would unify Iranians behind an unpopular regime, ignite a wave of retaliation that would leave thousands dead from Teheran to Tel Aviv, block oil exports from the Persian Gulf and probably necessitate a ground war, he said.

“The only viable solution is dialogue. You don’t deal with Iran with threats or preaching regime change,” said Weissman, who has lived in Iran, knows Farsi (as well as Arabic, Turkish and French) and wrote his doctoral dissertation at the University of Chicago on Iranian history. That’s where the Bush administration went wrong, in his view.

“President Bush’s demand that Iran halt all nuclear enrichment before we would talk with the regime was an excuse not to talk at all,” Weissman said. “And the administration’s preaching of regime change only made the Iranians more paranoid and told them there was no real desire to engage them, only demonize them. The thing they fear most is American meddling in their internal politics.”

His arguments would have had no effect on the previous administration. But his judgment offers powerful and welcome backing for President Barack Obama, who seems determined to pursue diplomacy.