I really think you should attempt to get a brief education in something very basic. Very very basic. All of the 9/11 bombers were from Saudi Arabia, with the exception of Fayez Banihammad who was of course from the well known hub of Democracy and tolerance the UAE. Was Saudia Arabia or the UAE attacked or invaded to root out the backers and the militants? I'm not starting this on this thread so go back to school. Or perhaps think about going to school.
I went to a pretty decent set of schools, including a school with a political science department named after a certain dead president.
So, by your reasoning, if you want to defeat the IRA , you should go after the bars of Boston and New York to squelch the funding, or if you're anti Israel, you should go to Los Angeles, New York and London to squelch the funding. Can that realistically happen? Of course not ... you go after where the bad guys are being indoctrinated, trained and equipped to squelch the immediate threat, and deal with the sympathizers later. So, let's attack Saudi Arabia, and create yet another uncontrollable ratsnest of anti-western sentiment. Are you a complete moron?
"If the mountain won't come to Mohammed, Mohammed will go to the mountain", and all that.