Abu Mook, before going into radio silence, takes a Parthian shot:
The casual arrogance with which the U.S. military has approached the conflicts in Iraq and Afghanistan has a direct relation to the difficulty with which we have fought each war. That we think we can send a commander to Afghanistan with no prior knowledge of Afghanistan and watch him be successful in the eleventh year of the conflict shows that after eleven years of conflict, we really don't know too much about Afghanistan. And we might not know too much about conflict either.
I've had this sense, but have never been able to put it into words as well as Abu Mook does here. "Casual arrogance" captures it exactly.