Shaykh Saalih al-Fawzaan (hafidhahullaah Ta’aala) stated :
“Not everyone who claims to be Salafi is truly Salafi.
Some individuals have made this claim but they are ignorant and they don’t know the Salafi Minhaj.
Some individuals have made this claim but they have actually adopted the methodology of the Khawarij, and this is displayed in their spilling of blood and causing mischief throughout the earth.
Others have made this claim but they are self-taught and they have not taken knowledge from the scholars, but rather, they have taken it from books and that which they have read. They depend on their memorization of texts without (true) understanding.
Source : The Reality of the Salafi Methodology by Shaykh ‘Abdullah al Dhufari pg. 65
[Translated in English by brother Mustafa George (hafidhahullaah Ta’aala)]