It may be reflective of ignorance by many average Iraqis. Maybe a U.S. convoy was teh target here, but don't they see that the terrorists have to destroy the Iraqi infrastructure to take over? Most attacks these days are on Iraqi police recruits. Imagine the holy hell that would break loose if we were not providing some security? Attacks on all institutions would increase, and the whole society would be at war or under totalitarianism in the aftermath.
Iraqi Infrastructure?
If our guys have to provide security for the Iraqi police, "infrastructure" may be pushing it a little bit...