On Sept. 11, 2001, some radical Islamists stole airplanes with which to attack the U.S. The overwhelming majority of these murderers were Saudi Arabians and had been educated in the intolerant version of Sunni Islam, called Wahhabi Islam, in the government schools and mosques of Saudi Arabia.
These inspired Saudis felt that attacking the U.S., or for that matter Shia Islam or any other belief system, was doing Allah’s work. Apparently none had a connection with Saddam Husein or Iraq.
We couldn’t invade Saudi Arabia because we needed their oil. Therefore, we invaded Iraq, against the wishes of the U.N. and most of our allies.