He's pretty much in the "Jews Did 9/11" camp at this point. I'd say they definitely had foreknowledge and certainly had the means & motive to make it worse (which likely explains building 7, and perhaps the freefall collapse of 1 & 2). That said, the evidence that the actual hijackings were 100% a saudi plot is near bulletproof at this point. About the only seriously unexplained thing at this point remains the Pentagon. If there were any role for an "Inside Job" I'd put it there, as it quite conveniently obliterated the department auditing pentagon expenses at the time.
That said, if you believe the stories about the Saudis being cryptojews...