wow, you are actually full on retarded. bush senior was known to have taken HUGE amounts of money from the saudis to become /theirguy/ on the inside. one of their big goals was to dominate the area's oil fields. saddam's army was far more effective than the saudis (which is no surprise if you know anything about the saudi military) so they demanded bush get saddam out. he failed, and it lost him the presidency. when his son then finessed a win in 2000, it became of vital import to get into iraq. depending on exactly how conspiratorial you want to get, 9/11 was either entirely, or partially an inside job by the saudis and any number of american agencies, possibly even mossad. that's why i said the hint was that the reason we invaded was that the majority of the hijackers were of that nationality; saudi.
the saudis sent a bunch of their boys to fuck up the US in a (potentially false flag) terrorist attack, and bush used this to capitalize and take the opportunity to depose saddam for real. the surge was the result of that. theories on why al qaeda claimed responsibility range widely, but my favorite is that bin laden was still pissed that his world trade center bombing in 1999 had failed to make any effect on the US.
this is a very classic 9/11 conspiracy, how young are you?