However, in the last couple of decades of the twentieth century several crises worked to erode Wahhabi "credibility" in Saudi Arabia and the rest of the Muslim world – the November 1979 seizure of the Grand Mosque by militants; the deployment of US troops in Saudi during the 1991 Gulf War against Iraq; and the 9/11 2001 al-Qaeda attacks on New York and Washington.In the West, the end of the Cold War and the anti-communist alliance with conservative, religious Saudi Arabia, and the 9/11 attacks created enormous distrust towards the kingdom and especially its official religion.
The two families have intermarried multiple times over the years and in today's Saudi Arabia, the minister of religion is always a member of the Al ash-Sheikh family, i.e., a descendent of Ibn Abdul Wahhab.
A second, smaller Saudi state (Emirate of Nejd) lasted from 1819–1891.
Its borders being within Najd, Wahhabism was protected from further Ottoman or Egyptian campaigns by the Najd's isolation, lack of valuable resources, and that era's limited communication and transportation.
Many, such as writer Quinton Wiktorowicz, urge use of the term Salafi, maintaining that "one would be hard pressed to find individuals who refer to themselves as Wahhabis or organizations that use 'Wahhabi' in their title, or refer to their ideology in this manner (unless they are speaking to a Western audience that is unfamiliar with Islamic terminology, and even then usage is limited and often appears as 'Salafi/Wahhabi')." Saudi King Salman bin Abdulaziz Al Saud for example has attacked the term as "a doctrine that doesn't exist here (Saudi Arabia)" and challenged users of the term to locate any "deviance of the form of Islam practiced in Saudi Arabia from the teachings of the Quran and Prophetic Hadiths".
Wahhabism refers to "a conservative Islamic creed centered in and emanating from Saudi Arabia," while Salafiyya is "a more general puritanical Islamic movement that has developed independently at various times and in various places in the Islamic world." Wahhabism is the Saudi version of Salafism, according to Mark Durie, who states Saudi leaders "are active and diligent" in using their considerable financial resources "in funding and promoting Salafism all around the world." Hamid Algar and another critic, Khaled Abou El Fadl, argue Saudi oil-export funding "co-opted" the "symbolism and language of Salafism", during the 1960s and 70s, making them practically indistinguishable by the 1970s, The Wahhabi mission started as a revivalist movement in the remote, arid region of Najd.