I can agree with your post..but there is more to it then oil/resources, though they weigh heavily in this theater as you’ve shown.....but you have to control the land before you can control the resources...as well the population.
Additionally, one cannot discount what’s driving the moslem ‘fighters’, and the muslim nations who will support them in bringing about the Caliphat... because there are two nation parties using these fighters in order to ‘win’ leadership roles in the Caliphat....and thereafter take on the World.