That is the problem.
One of the goals of this entire operation is to try and make the Iraqi definition of "legal" closer to the Western view, and not so much the tribal "revenge" tradition.
If Allawi is actually assassinating opponents who are rabblerousers, but not actually participating in violence (I wouldn't mind if someone shot Zarqawi), or even if people in Iraq only THINK he is doing this, this is not progress. I'm looking at the long range picture here.