In a visit to Makkah in the year 1926CE King Abdul-ʿAzeez Aal As-Saʿood, the then king of Saudi Arabia proclaimed the constitution of the Kingdom, stating:
“Article 5: All of the laws of the Kingdom are executed in accordance to the Book of Allāh and the Sunnah of His Messenger and in accordance to that which the Companions and the Salaf us-Sālih were upon.” 
Regardless of these proclamations from the rulers, the radicals still declare them to be unbelievers, worthy of being killed. And this is due to the fact that they see deficiencies and imperfections in the rule.
 Al-Wajīz fī Seerat al-Malik ʿAbdul-ʿAzeez, pp. 90-91