PRINCETON – Although Al-Qaeda’s leadership, beliefs, and ideology are rooted in Saudi Arabia, the organization has been all but crushed in the Kingdom by a government policy that combines a big carrot and an even bigger stick. The attempted assassination in Jeddah last month of Prince Muhammad bin Nayef, the deputy interior minister for security affairs, demonstrates both elements of the Saudi strategy, and how a bold attempt by Al-Qaeda to revive its fortunes has failed.