We invaded Iraq instead of Saudi Arabia where the hijackers came from - Was
Will this canard never die?
Bin Laden and some of his cronies were Saudi but, despite his family's long relationship with the House of Saud, he was disefranched by the regime long before 9/11.
Al qaeda was primarily motivated by their contempt for the Saudi state. Saudi did not facilitate 9/11. I can think of many reasons to criticise Saudi Arabia but 9/11 is not one of them.