Agree, they are a threat to the locals. Saudi is not amused as ISIS is following almost exactly the same blueprint, including beheading, that Ibn Saud used in the 20s to grab what is now Saudi Arabia.
The ultimate goal of ISIS and other similar groups is to take over Mecca and Medina and replace the Saudi king, i.e. to be the new “Custodian of the Two Holy Mosques”. The fact that the original sites were destroyed many years ago is not of importance to them. They are fighting for a fiction that is imprinted in their brains. No wonder that they are against the West as science and technology not to mention democracy is considered anathema.
Good points. ISIL has been very clear that their ultimate goal is the conquest of Mecca.