The Saudis would have something to say about that. They are inexorably linked with the USA via the 3 big American and Dutch Shell petroleum companies. The USA gives the three American petroleum companies beaucoup tax breaks for that very reason...our reliance on their petroleum/natural gas resources.
The AMERICANS (privateer oil companies, NO American government EVER involved) began that link in the 1920's and finally the King bought them out in 1982 so that the Saudis could finally own their own natural resources again.
The Saudis kicked bin Laden out of the KSA. They would do so to any terrorist who threatened their ONLY source of revenue. They have EVERY reason in the world to keep ISIS out of their country...and every other country over there. They need NO civil strife, wars or "conflicts" interfering with the flow. "The spice must FLOW." (Mu'a dib) Sorry, couldn't resist.
Also, the Saudis WILL run out of petroleum/natural gas one day. They have another 200 years of reserves but THAT will disappear one day. SO, they have to plan for life AFTER their God-given gift runs out.
I agree with regard to the Saudi royals. Or at least those of them presently in control.
That is, however, a pretty small percentage of the nation and even of the royal family. There are most certainly strong elements in Saudi with definite incentives to overthrow the present system and themselves get control of all that money.
Probably including some of the royals. The Family is so huge now that there is no way they can all be maintained in the lifestyle to which they believe themselves entitled.
There are also the hardline Wahabbis, who are fully aware of the decadent lifestyles of the royals, and are in more or less full agreement with the ISIS ideology, though they may differ on who should be in charge of that ideology.
All these groups have reasons to ally themselves with ISIS for a share of the spoils.
I have no idea how cohesive the Saudis are, so don’t know whether the forces leading to discord are greater than those tending to peace.
I do know that their population is growing rapidly, but their revenue is most definitely not keeping pace. This is not a recipe for social peace.
“KSA...They would do so to any terrorist who threatened their ONLY source of revenue.” — um not quite. They’ve been building their pilgrim ‘tourism’ to Mecca, because they know & said they can’t rely on ongoing oil revenue. That pilgrim tourism is becoming a multi billion dollar business, with significant investment in it. There was a documentary about that on tv a few yrs ago, interviews with a couple of Saudi royals too.. anyhow the ruling class of SA is excepionally wealthy already & has been for decades.