Why do you believe hatred toward the United States could lead to the 9/11 attacks?
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).
A fascinating read on why this fight will go on. Those who believe that Sept 11 was a one time event, or that we don't need to worry about terrorism much because it is part of the beliefs of a fringe group of extremists ought to sleep less well at night... The whole piece is worth reading. But not before bed.