Vice President Biden was on “This Week” with George Stephanopoulos yesterday talking about Israel bombing Iran:

STEPHANOPOULOS: But just to be clear here, if the Israelis decide Iran is an existential threat, they have to take out the nuclear program, militarily the United States will not stand in the way?

BIDEN: Look, we cannot dictate to another sovereign nation what they can and cannot do when they make a determination, if they make a determination that they’re existentially threatened and their survival is threatened by another country.

The vice president made this point three times.

I suppose it would have been tangential to point out that Biden’s view of sovereignty has not always been so robust. Or that he is effectively renouncing the international laws of war, which dictate what self-defense allows.  But Stephanopoulos might have at least acknowledged the irony of this particular exchange. Iran, the country being bombed in his question, is also a sovereign nation. Biden’s needlessly universal principle – U.S. deference in the face of a sovereign nation’s determination that it is in danger – would protect its right to build nuclear weapons. 

Biden is being overly broad to obscure the fact that he’s granting Israel special rights, of course. But it’s still worth pointing out that it’s a bad principle, if “not dictating” means never saying “bad idea.” When considering war, the opinions of other nations are generally worth knowing. Some of our European friends argued in 2002 that invading Iraq would not enhance our security, after all. Useful advice! Offering our opinions is perfectly consistent with a policy of military restraint.

The problem here goes beyond the principle though. We give Israel all sorts of aid. The F-16s and F-15s carrying out the bulk of the attack would be U.S.-made. They might pass through Iraqi airspace that the U.S. effectively controls. Historical U.S. support for Israel means that people around the world reasonably hold Americans responsible for what Israel does to Iran. Sooner or later, probably sooner, an Israeli attack on Iran would be likely to produce blowback, diplomatic or otherwise, that would damage us. Given that, our position should be that attacks on Iran are unacceptable, and would cost Israel our support.

For analysis on Israel’s ability to disable Iran’s nuclear programs, read Whitney Raas and Austin’s Long’s work.