A different view?
ISIS is just doing what the muslims in this region have tried to do every few hundred of years since as far back as we have records.
I suppose its interesting to try and figure out why, but this guy acts like its utterly unexpected.
This is how Muslims operate, for whatever reason.
The strongest and most influential takes power for as long as they can until their faults become too overwhelming and eventually lead to their downfall.
This is just another Caliphate.