Good point. They weren't acting on behalf of Saudi Arabia or any other country.
actually, there was a great deal of intelligence tying the 911 guys to Pakistani Intelligence (ISI) and yes, Saudi Arabia.
The lead general of the ISI wired Muhammed Atta 100,000, several days before the 911 attacks. He then had breakfast with Goss (future CIA chief) and Graham (a 911 commissioner) on the morning of 9/11 as the attacks were taking place.
I hope the more intelligent readers here would think this is weird. Also weird is that this general's name was removed from all transcripts and recordsing made by the white house, even though CNN and CSPAN picked it up up just fine, during the 911 commission hearings.