Exactly. Except for Intelligence agencies, we do not know who did it. However, the media consensus is that the enemy did self sabotage to show us they can do bad things? We know they very well can do bad things. They do not have to prove it.
Hell, GWBush was an inch away from approving tactical nuke use in Afghanistan but ultimately talked out of it and opted for the MOAB, but now a cornered rat thinking about it is now crazy? Does that mean GWB was crazy too?