The Islamic State of Syria and Iraq (ISIS), al-Nusra Front, al-Qaeda and similar groups are not really states the sense we understand. They are an idea of extremism that unites those who subscribe to it and those who support it in different forms, either with bullets, dollars, words or emotions. There are extremists who may be against taking up weapons, but they agree with violent groups on the ultimate idea and goal, even if they differ on the means to use.
Unlike what's common in political analysis, extremism and extremists have always represented a threat to the Saudi Arabia. But this truth gets lost in a sea of accusations and the whole image is blurred even to the most well-informed people on the Middle East and Saudi Arabia in particular. This false historical understanding of the friend and the foe is no longer limited to foreigners and Arab propagandists. This false understanding has entered Saudi Arabia itself where some believe it and other extremists promote it. I think extremism is the biggest enemy and is the biggest threat to Saudi Arabia. This is why it's in our interest to systematically, institutionally and continuously fight it.
Historically speaking, the battles which Saudi Arabia had to fight domestically were all against religious extremists and the only exception was the threat of the Nasserite movement, which didn't exactly pose a threat. The first confrontation with religious extremists began 17 years after Saudi Arabia was established. They were known as the "Brotherhood" and they resembled the ISIS in their extremism and cruelty. They rejected the concept of the modern state and international relations and decided to disobey the authority of King Abdulaziz and attacked Iraq. They clashed with Iraqi tribes and British forces and managed to spread terror in some areas and downed a military British plane, according to Glubb Pasha. After their failure, extremists began attacking Saudi areas and cut trade routes. After King Abdulaziz failed to convince them to change course, he fought them until he eliminated them.
There are extremists who may be against taking up weapons, but they agree with violent groups on the ultimate idea and goalAbdulrahman al-Rashed