The belief that there is an Islamic military group that is friendly and another that is evil is a pure myth. All Islamic organizations we see today, from Afghanistan to Algeria and Nigeria, are hostile and subscribe to a takfirist ideology (which involves accusing others of apostasy). They raise the banners of Islam and resemble the mobs of those who defected from the Muslim community during the dawn of Islam, those who were called the “Khawarij.” History is full of horrific accounts of their crimes. Caliphs Othman, Ali and Moawiya all fought against them.
The act of taking up arms and the willingness to sacrifice oneself is mostly linked to extremist religious thinkingAbdulrahman al-Rashed