“But I think it’s important that, whatever we call it, we recognize that these are not religious people and, in fact, these enemies of all civilizations, what they want to do is to cloak their criminal behavior under this false idea of some kind of religious war."
--McMaster 

People from the left of the political spectrum have been saying this for over a decade. Extremists are not religious, nor are they in any way representative of the people or religion they claim to represent. 
You have to wonder when right-wingers will finally understand that simple fact.