For the most part you're correct.
Islam is still in its 'modernization' period, where certain old-world aspects of it are forgotten in favor of more modern societal standards. It happened with Judaism, Buddhism, and Christianity. For example, no Christians stone their children for misbehaving anymore, or trade slaves for donkeys, even though the Bible instructs them to do so. These ideas are in conflict with the core of modern societal standards. The great issue is as you said, is that these areas are war torn, and the regions haven't been given the chance to rebuild themselves. Philosophical introspection and natural modern progression are difficult to achieve, let alone when citizens are living in fear of their homes being bombed, or their children dying in suicide attacks. If more moderate Christian countries were put through the same paces of broken societies, corrupt and shambling governments, and constant civil war and political strife; it would be easy to see headline news stories of Christian terrorists killing in the name of the bible, even in just a few generations.