Are you trying to imply a conspiracy here?
Oh have some respect for the both of us and allow for an option other than mainstream consensus, skepticism and criticism are human virtues.
What's to say that OBL isn't just a figurehead? What's to stop intelligence agencies from inflating their enemy's strength to suit their own or their allies' purposes like many instances in history? What responsible person takes everything the government displays at face value?
Do I see a more credible alternative? Not on the major points, as for responsibility OBL's tape's timing was the most likely explanation.
But what's to say OBL has as much influence as before if any? I doubt we'd ever know considering the security of the matter, but good deduction would assume that if they knew so much about the inner workings of AQ then why did it take them so long to start bashing on the organization? So yes I doubt the value of killing OBL.
How could AQ, a supposedly massive international organization communication, fund and transport without knowledge of NATO & allies? A person may assume that if 3/4 of the world wanted an organization dead, it would be found based on sheer attrition. So yes I doubt the official stated scope of the organization.
Do I think it's an inside job? No, that's stupid, treasonous, and reeks of "I know better, now pay attention to me". If it was they could've timed it better, targeting targets of less economic damage but more emotional importance, and various other details. Also minor technical details such as structural tumbling on the South side which is incredibly hard to fake reinforcing the legitimacy of an actual attack vs planned demolition.
Do I think players are using the event to their own intents? Of course that's human nature, but the current manipulation of the event is making things worse off (EX: shit like Iraq).