If any of you would like to see pictures of the Iran / Iraq border, let me know and I can email them to you. I have been to the border areas up North a number of times, and yes, one could easily pass without being detected. So there is truth to that part of their statement. I am sure the Mountains on the Iran / Afghan border are just as desolate as they are here.
Regarding their blind eye to such things, I can only assume based off their past history, that the Iranians will support many, regardless of sect. in order to play in the big leagues with the US. It should well be noted that Iranians are more than likely the cheif financiers of the trouble with Sadr City and Al Sadr's Militia.
Absolutely on the Al Sadr thing. My point is that whilst AQ will be happy to see anyone killing coalition forces, they would have Al Sadr on the end of a rope in a heartbeat. Don't forget that the worst atrocity to date was the bombing of Karbala (I think) at the Shia Al Shura festival.
The Wahabi despise Shias and regard them as traitors to God