A commenter wrote:
To make a decision on whether to invade Iran, because they may obtain nukes, is whistling past the graveyard. Israel and Europe need to defend themselves, and the US should stop playing the impossible task of World's cop - especially when the analogy is a cop trying to win the drug war. Stop wasting US dollars and US lives. Our economy is in bad enough shape thanks to internal policies, we don't need to act like an empire to make it worse.
He seems to be saying that Iranian nukes aren't our problem. If Iran has a nuclear exchange with Israel it's not our problem. If Iran wants to take over the oil fields of neighboring countries, it's not our problem.
Unlike the commenter, I lack the certainty that these things aren't our problem or that we should not care if millions in the Middle East die in a nuclear exchange. This would seem to me to be much more of a problem for us than what was going on in Serbia in the 1990s, yet the same anti-war Democrats who oppose Bush cheered on Clinton's military intervention in the Balkans.
But the danger to the United States is even more direct, because the motto of the government of Iran ever since the hostage crisis has been to bring "death to America." They are still shouting that slogan even today. According to a Pakistani newspaper,
Thousands of religious hardliners chanting “Death to America” gathered in Iran’s central desert on Tuesday [April 25th] to celebrate a failed US hostage rescue mission 26 years ago.
Luckily for us, the Iranians have no way to bring death to the United States mainland. Today.
If Iran obtains nuclear weapons, the Iranians would indeed have the means to bring death to hundreds of thousands, possibly millions, by sneaking a nuclear bomb into the United States and detonating it in a densely popoulated city such as New York.
Looking the other way and pretending that these religious nuts aren't really serious about bringing us death is simlar to how the world looked the other way when Hitler was running Germany. We should take the Iranians at face value, assume they mean it, and therefore a pre-emptive strike becomes our obligation.