[SJackson]

Egypt and Jordan are acting. The US won’t resupply Jordan. That’s money, not blood. There’s an opportunity the US is losing in the region for lack of leadership. Witness Iraq, for the cost of a few drones, artillery and I presume some advisors, they’ll be taking Tikrit. Mosul next. Paid for with Arab blood, Iranian supplies and training.

[Theoria]

That isn't enough. Saudi Arabia is the 4th largest spender of military equipment, largely from US. They can do go to war at anytime for 'peace'.

But, we all know that do they don't really care as long as ISIS is killing the Shia and not trying to overthrow their little franchise.