Make no mistake about it: when House of Saud was (and is) sponsoring and arming Islamist fanatics, the US was aware and supportive of the endeavor

http://www.arabnewsblog.net/2013/11/02/make-no-mistake-about-it-when-house-of-saud-was-and-is-sponsoring-and-arming-islamist-fanatics-the-us-was-aware-and-supportive-of-the-endeavor/