You need to get your books right and stop reading propaganda things and before you say anything more stupid let me remind you that Israel used to support and help Hamas at times, thinking that maybe we could brainwash them to bring down PLO.
Same case again here, Western countries at times used to support these Jihadist groups for their own cause, they wanted them to bring down Soviet Union which they did and we all know that 9/11 is hoax created by their own governments. Have you ever seen a building hit by a plane and it comes straight down to the ground. If anyone wanted to kill American people, the building wouldn't be coming down straight to the ground. These are the same people who said that Saddam Hussein had weapons of mass destruction and yet nothing was found.