Why Turkey is reluctant to fight ISIS/IS and how it undermines Kurdish efforts (furthermore, it is possible that Turkey funds extremists such as al-Nusra):
Good read on the painful „does the Islamic state have anyhting to do with Islam“-debate (spoiler alert: yes, obviously. And pretending it doesn’t is not very helpful to spark inner-Islamic reform):
See also this article on how you can use the Quran and the life of Mohammed both as a justification and a rejection of ISIS strategy and actions:
Ralph Janik 