9/11 made it almost inevitable for the US to invade Afghanistan and start the "war against terrorism". But invading Iraq was still a mistake... What I would really want to know is whether 9/11 was really planned by Al Qaida or other Muslim organisation, or if it was a trick of Bush & Co to turn the public opinion in order to invade Iraq and Afghanistan, so that Bush & Co could seize the control over the petroleum in those regions. I admit being cynical by nature, but something tells me that this latter hypotheis could be closer to reality.
If that is true, the conflict of civilisations between the West and the Muslim world was actually started by Bush & Co. After all, Hitler burnt the Reichstag the accused the Jews to prosecute them more easily. And the Japanese bombed a Chinese railway then accused some Chinese rebels of doing it so that they could take control of the region... Hypocritica manoeuvres have long been the ideal pretext to attack people who haven't done anything with the approval of the general public...