I believe this is propaganda. The Saudis are worried about nothing.
Everyone living in the mess that is the Middle East is worried — all the time
The only thing the Saudis are worried about is not getting a return on their investment by not being able to run pipe through their client state in Syria. Right now, it’s Russia’s client and not inclined to lay Saudi pipe.
The Saudis aren’t going to spend any more cash than they can afford.