One of the ways the ostrichian West has responded to Islamic terrorist attacks in general, and ISIS in particular, has been to argue variants of the following:
"These terrorists attacks have nothing to do with religion."
"They have nothing to do with Islam."
"Islam is the religion of peace; the extremist violence is anti-Islam."
At first blush they have a point. It is evident on every hand that most violence in the Islamic "world" consists of professing Islamic believers killing and maiming, enslaving and raping other Islamic believers. Clearly this is contrary to the teachings of the Prophet.
The Quran clearly states that "(i)f a man kills a Believer [Muslim] intentionally, his recompense is Hell, to abide therein (forever): and the wrath and the curse of Allah are upon him, and a dreadful penalty is prepared for him." It also states that a Muslim may not take "life, which Allah hath made sacred, except by way of justice and law." [Cited by Jay Sekulow, Rise of Isis (New York: Howard Books, 2014), p.30.]There are also a series of hadiths (recorded sayings of Muhammad) expanding on this doctrine: