Global Research TV
Osama bin Laden, originally from a wealthy family in Saudi Arabia, was a prominent organizer and financier of an all-Arab Islamist group of foreign volunteers; his Maktab al-Khadamat funnelled money, arms, and Muslim fighters from around the Muslim world into Afghanistan, with the assistance and support of the Saudi and Pakistani governments. These foreign fighters became known as "Afghan Arabs" and their efforts were coordinated by Abdullah Yusuf Azzam. (Wikipedia)
The CIA calls it "blowback," aka "unintended consequences."