But, for all the plausibility that Iran might be willing to blow up a Saudi ambassador, it's not at all apparent what they would gain from it. Iran has never been shy about sponsoring terrorism, but only when it was within their interests, or at least their perceived interests. It's hard to see how they could have possibly decided on a plot like the one that Holder claimed today.

What would it really mean for Iran if the Saudi ambassador to the U.S. were killed in a terrorist attack in Washington? The U.S.-Saudi relationship has been bad and getting worse since the start of the Arab Spring, with the Saudi monarchy working increasingly against the democratic movements that the U.S. supports. A senior member of the royal family even threatened to cut off the close U.S.-Saudi relationship if Obama opposed the Palestinian statehood bid, which he did. If the U.S. and Saudi Arabia really broke off their seven-decade, oil-soaked romance, it would be terrific news for Iran. Saudi Arabia depends on the U.S. selling it arms, helping it with intelligence, and overlooking its domestic and regional (see: Bahrain) abuses.

If the U.S.-Saudi alliance fell apart, the Shia-majority Islamic Republic of Iran would have an easier time pushing its regional influence against Saudi Arabia, especially in some of the crucial states between the two: Iraq, Bahrain, and the United Arab Emirates. Iran would be able to reverse its increasing regional isolation and perhaps flip some Arab leaders from the U.S.-Saudi sphere toward its own. The best part of this, for Iran, is that it probably wouldn't even have to do anything: the U.S.-Saudi special relationship, if it collapses, would do so without Iran having to lift a finger. The dumbest thing that Iran could possibly do, then, would be stop the collapse, to find some way to bring the U.S. and Saudi Arabia back together. For example, by attempting to blow up the Saudi ambassador to the U.S. on American soil.

My bold

keep to the Fen Causeway