To understand the relationship.between the two, do fathom the contents of the artcle above and my comments below.
We need to understand some history before answering the question.
The Khawarij are people who stand outside mainstream views.
During the nascent period of Islam, the Kharijites emerged during the the first century as an opposing force who refuse to accept the validity of the first three caliphs.
They reject the mainstream traditional views of Islam concerning political succession.
Both Salafists and ISIS are considered Kharijites groups today
Because Salafists – SIS groups separate the shell of the surface from the kernel or substance of Islam, they are being made used by hegemonic secular powers via instigation.
The Salafists and Kharijites are splinter groups: Both are headless horsemen. So is ISIS.
The US State department makes use of such groups to attain certain hegemonic agenda.
The Salafists and Kharijites groups mentioned above are secular in substance.
The Kharijites emerged as Salafis under the banner of the Wahabbi movement a couple of centuries ago.
Wahabbism is secular in substance and has been used by the European secular powers for hegemonic reasons, to secure cheap oil for instance.
In fact, the Salafi Wahabbi movement gained momentum because of support from secular powers right from the beginning when it began its expansion in Arabia.
Salafi ISIS stand outside of mainstream Islam.
By Najman Hussain