Christianity Today has an important interview with this Islamic authority. It begins:
Islam is the final revelation, therefore those believing in it submit to Allah—the only One worthy of obedience in every sphere of life. To understand 9/11, we must go back to Tawhid— the exclusive worship of God in every sphere—religious, political, social, etc. Every human action must relate to this. 9/11 was undoubtedly an unpleasant moment for its targets or their relatives (Muslims and non-Muslim), but those committing it acted as a result of the predestined divine decree (although God does give man free will).