The radical faction of Islam, known as the Salafi, are a movement created through British intrigue and coordination with occult secret societies, toward fomenting a “Clash of Civilizations”. And though the West is largely unaware of them, they are almost entirely responsible for the extremism that Islam is mistakenly perceived for.
There is no need to debate with the Salafi/Wahhabis on ideological grounds. It's their history that condemns them most effectively. Until now, it had been difficult to get precise details on Saudi history. However, I read an excellent book recently by David Cummins, called the Wahhabi Mission and Saudi Arabia. It is the only comprehensive study of the history of SA and Wahhabism that I know of.