Mark Steyn makes the case in City Journal for doing whatever is necessary to prevent Iran from obtaining nuclear weapons. His essay is a bit longish, but here are some excerpts:
If Belgium becomes a nuclear power, the Dutch have no reason to believe it would be a factor in, say, negotiations over a joint highway project. But Iran's nukes will be a factor in everything. If you think, for example, the European Union and others have been fairly craven over those Danish cartoons, imagine what they'd be like if a nuclear Tehran had demanded a formal apology, a suitable punishment for the newspaper, and blasphemy laws specifically outlawing representations of the Prophet. Iran with nukes will be a suicide bomber with a radioactive waist.
Four years into the "war on terror," the Bush administration has begun promoting a new formulation: "the long war." Not a reassuring name. In a short war, put your money on tanks and bombs-our strengths. In a long war, the better bet is will and manpower-their strengths, and our great weakness. Even a loser can win when he's up against a defeatist. A big chunk of Western civilization, consciously or otherwise, has given the impression that it's dying to surrender to somebody, anybody. Reasonably enough, Islam figures: Hey, why not us? If you add to the advantages of will and manpower a nuclear capability, the odds shift dramatically.
Anyone who spends half an hour looking at Iranian foreign policy over the last 27 years sees five things:
1. contempt for the most basic international conventions;
2. long-reach extraterritoriality;
3. effective promotion of radical Pan-Islamism;
4. a willingness to go the extra mile for Jew-killing (unlike, say, Osama);
5. an all-but-total synchronization between rhetoric and action.
Yet the Europeans remain in denial. Iran was supposedly the Middle Eastern state they could work with. And the chancellors and foreign ministers jetted in to court the mullahs so assiduously that they're reluctant to give up on the strategy just because a relatively peripheral figure like the, er, head of state is sounding off about Armageddon.
What's the difference between a hothead and a moderate? Well, the extremist Ahmadinejad has called for Israel to be "wiped off the map," while the moderate Rafsanjani has declared that Israel is "the most hideous occurrence in history," which the Muslim world "will vomit out from its midst" in one blast, because "a single atomic bomb has the power to completely destroy Israel, while an Israeli counter-strike can only cause partial damage to the Islamic world." Evidently wiping Israel off the map seems to be one of those rare points of bipartisan consensus in Tehran, the Iranian equivalent of a prescription drug plan for seniors: we're just arguing over the details.
So the question is: Will they do it?
And the minute you have to ask, you know the answer. If, say, Norway or Ireland acquired nuclear weapons, we might regret the "proliferation," but we wouldn't have to contemplate mushroom clouds over neighboring states. In that sense, the civilized world has already lost: to enter into negotiations with a jurisdiction headed by a Holocaust-denying millenarian nut-job is, in itself, an act of profound weakness - the first concession, regardless of what weaselly settlement might eventually emerge.
Back when nuclear weapons were an elite club of five relatively sane world powers, your average Western progressive was convinced the planet was about to go ka-boom any minute. The mushroom cloud was one of the most familiar images in the culture, a recurring feature of novels and album covers and movie posters. There were bestselling dystopian picture books for children, in which the handful of survivors spent their last days walking in a nuclear winter wonderland.
Now a state openly committed to the annihilation of a neighboring nation has nukes, and we shrug: Can't be helped. Just the way things are. One hears sophisticated arguments that perhaps the best thing is to let everyone get 'em, and then no one will use them. And if Iran's head of state happens to threaten to wipe Israel off the map, we should understand that this is a rhetorical stylistic device that's part of the Persian oral narrative tradition, and it would be a grossly Eurocentric misinterpretation to take it literally.
Once again, we face a choice between bad and worse options. There can be no "surgical" strike in any meaningful sense: Iran's clients on the ground will retaliate in Iraq, Lebanon, Israel, and Europe. Nor should we put much stock in the country's allegedly "pro-American" youth. This shouldn't be a touchy-feely nation-building exercise: rehabilitation may be a bonus, but the primary objective should be punishment - and incarceration. It's up to the Iranian people how nutty a government they want to live with, but extraterritorial nuttiness has to be shown not to pay. That means swift, massive, devastating force that decapitates the regime - but no occupation.
The cost of de-nuking Iran will be high now but significantly higher with every year it's postponed. The lesson of the Danish cartoons is the clearest reminder that what is at stake here is the credibility of our civilization. Whether or not we end the nuclearization of the Islamic Republic will be an act that defines our time.
And time seems to be short and getting shorter. Read Steyn's entire essay at the above link. It's very good.