They took boxcutters on the planes. They killed the pilots. They piloted the planes into the buildings. All of the evidence points that way and there is no contrary evidence.
Can you make an offer of proof that that isn't true? Or can we safely leave this subject behind until there is at least SOME actual evidence contradicting their guilt?
Beyond that, I have nothing more to say on this subject, and I can't spend any more time on useless, baseless conjecture.