Saudi Arabia is the primary target of both ISIS and al-Qaeda.
Jihadists, coveting control of the Islamic world, know that their ultimate platform is the Saudi kingdom with its holy places and its wealth. They realize they will never win any “market share” outside the Muslim world. As such, organized jihadi terrorism directed at the United States has been aimed squarely at provoking America to sever its relations with the Saudi kingdom. Once this is achieved, jihadists hope they can isolate their prey and then go in for the kill.