I disagree. Al Qaeda has been forced to redirect its resources. Just because the 19 who struck us on 9/11 were Saudis doesn't really differentiate them ideologically from those coming from Syria and Iran.
The 19 who struck us on 9/11 didn't need much help at all. They planned these attacks from places like London, Hamburg, and Jersey City . . . and the plane tickets were the most expensive part of their plan.