National unity, anyone?

I’m just wondering where all those people are who’ve been earnestly worrying that Iraq will collapse into sectarian civil war if the US forces should leave? (I wrote a little about that issue, here— scroll down about halfway.)
It seems to me that, by deciding to strike simultaneously against targets significant to both the Sunni and Shi-ite communities in Iraq, the US military has been doing a magnificent job of cementing a robust sense of national unity among them.
Maybe that was the plan?