&gt;  That Islam allows a way for them to recruit does not mean they are Islamic only opportunistic.<p>Simply wrong. Read <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Wahhabism" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Wahhabism</a> The ideology existed longer than the specific group called ISIS. They just dialed it to 10 what was always more and more cooking for the last few decades. That they are a bit more extreme than how Al-Quaeda is perceived in the West now doesn&#x27;t mean that the exact Islamic ideology wasn&#x27;t fully formed before, including the treatment of those with who they fight.<p>The reason why they call themselves &quot;people of hadith&quot; is because they really believe to just repeat what their prophet was doing, and that that is the major goal of a true believer. It&#x27;s in <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Hadith" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Hadith</a> that they can read about every beheading and stoning performed by Mohammad. They just literally ask themselves &quot;What Would Mohammad Do&quot; in the sense that they &quot;reject the use of Hellenistic philosophical discourse &quot;(kalam)&quot; in favor of strict textualism in interpreting the Quran.&quot;<p>Pretending that all this doesn&#x27;t exist (on rejecting to learn) won&#x27;t help anybody understand what&#x27;s going on.