The Iraqi's are in a position to see people who stand out like a sore thumb in their country. If it is Al Queda, they will face the same problem as Uday and Qusay did with informers.
This is especially true if water mains etc. continue to be targeted. Even if it isn't Al Queda, the Iraqui's will be looking for anyone capable of causing the problem. Water is almost worth more them than oil is right now.