International law hardly exists in these days. It's just brought up if it serves a certain narrative and if it doesn't it can easily be overlooked and ignored.
No, I also have zero sympathy for these "kingdoms". Qatar financed the destruction of Syria and the Saudis let themselves use and finance the brutal assault on Yemen, which went on for years.
Interesting is, that all these countries there (except Iran and Yemen) operate under the US umbrella. Divide and conquer (or rule?) near perfection from an US point of view.
We will see for how much longer can they keep this charade up. At the end it's all about "take the oil, we want to keep the oil, we have secured the oil."