So what if Iran is arming Shiite militias?

At the risk of being repetitive, let me again say that the "left's" -- for lack of a better term -- crucial error in the lead-up to the war with Iraq was accepting the argument that an invasion would be justified -- legally and morally -- if Saddam Hussein possessed WMD.

That meant that we were debating the intelligence, and hawks within the administration always had more access to it than any of us outside the government did. We lost that debate when we accepted its terms -- the response should have been that Iraq was a piss-poor country that was well contained whether or not it had some old stocks of gas or germs buried in some hole somewhere.

So here we come to Iran. As everyone and their cousin has pointed out, it's just like the last time around, with anonymous government sources using dubious intelligence to blame Iran for the occupation's woes. We even have the same reporters carrying the neocons' water this time around as did the last.

We certainly have to counter the administration's claims. The briefing given in Baghdad doesn't add up; even if it did, we're still talking about 5 percent of U.S. fatalities; there's no smoking gun, and weapons manufactured in Iran could have come into Iraq via Hezbollah or could have been acquired on the international arms market; the focus on Iran is a distraction, and ignores evidence that the Saudis are lending support to the Sunni insurgents responsible for the lion's share of American casualties -- all of these are important points to make.

But let's not forget to make the bigger argument: even if Iran is furnishing weapons to Shiite militias, it's not a legitimate casus belli. I'll skip the fact that international law guarantees all people the right to resist armed occupation and go to the real heart of the matter: in the bloody mess that Iraq has become, the U.S. and Tehran are backing the same factions. We're on the same page with Tehran -- we're allies, or at least strange bedfellows.*