One of the most absolute deluded poster on this forum. I don't even know sometimes in which universe you exist in because you only type down things taken from an alternative universe because it certainly ain't in this universe..
First of all KSA has zero fuks to do with ISIS or other AQ or none state actors that is as zero fat fuks KSA doesn't deal with these elements and there is animosty between these elements and KSA who are outlawed in KSA and you can only believe in that stuff if you believe in bigfoot as well being real. Stop wasting your time in conspiracy theories.
As for the Kingdom being enemies with Iran because of others that is fake also and the assumption that the US has anything here. The Kingdom is unchellenged in the region and I mean nobody can chellenge them in the region as in become threat to them in fact not many can in the whole world except NATO due to a vast coalition. They have stronger base than Iran in the region forget the US in this occasion. KSA faces zero regional competition whatsoever or threat regionally that is just a ground fact. They have the right amount of allies and backing that not even Turkey has. Egypt, Jordan, UAE, Qatar, KSA, Sudan etc etc and many more they are strongly represented regionally hence the projection of Iran being something that can alter anything with KSA geopolitically is hilarious. The only existential threat KSA faces is a multiple NATO force of a vaste coalition hence Iran doesn't have the numbers it falls far from that and basically harmless entity that is just the hard truth and ground reality. So all of this projections you are doing is basically not ground realities and you just deluding yourself from what is on the ground.
There is fiction and there is fact you never mix these two together because they just don't work out together.