He is not wrong when he says Al Qaeda attacked us because of our troops in Saudi Arabia. Al Qaeda said as much.
He could have then said that is no excuse, or it was a great evil or something... Instead, he makes it seem like a reasonable response to a perceived slight.
So he did EXACTLY what this story said he did. He uncritically repeated Al Qeda post 09-11 propaganda as fact. Spin as hard as you want, the fact remains he did do it.