I don't give two shits about the KSA. What I do however give to shits about is the global impact of such an attack.
Yeah it is about the oil, hate to say it.
The attack halved KSA's output of oil. Halved. It drove oil to go up 18% in one day. And another 14% today. This has global economic impact not just on KSA, but the US, and Europe.
First and foremost:
Countries which are highly dependent on oil exports to sustain themselves, such as Russia, and Venezuela stand to gain quite a lot here – especially since both were having economic problems that put great strain on their respected governments. Iran as well since the sanctions were actually working really well and was putting such a major strain on the government that they had to seriously cut the amount of money they use to fund the various fundamentalist organizations around the MENA.
Second, oil spikes have historically made massive problems for global economies.
And to put it into perspective, the attack this weekend was the biggest oil disruption in history, outweighing that of the Iranian revolution.
So yeah. We are going to feel it. And already are since stocks have taken a hit today
Now KSA is saying it's going to try to rebuild 1/3rd of their loss by the end of the day. But if this is the kind of war that Iran wants to play, the world is going to be, inevitably, dragged into it.
The US has had no reason to go to war with Iran. The sanctions are working, and will continue to work. It would be politically untenable for it to do so. But, if Iran's goal is to continue a war of energy-disruption, the economic impact that it could have on the rest of the world would foster political will to put troops on the ground. And I know no one here, including myself, wants that.