And then we complain about the executive overreaching.
If such a thing existed, then anytime a teacher grades on a curve, the students with the lowest scores should be able to sue the top performers for "stealing good grades" from them.
https://www.congress.gov/bill/114th-congress/senate-bill/204...
Saudi Arabia will of course respond to any such suit in the context of their relationship with the United States, but you can sort of predict that US actions related to enforcing the outcomes of cases will be rather restrained.
https://en.wikipedia.org/wiki/Pan_Am_Flight_103
It's not hard or even unusual to sue a country. Do you have any idea how many lawsuits are currently underway involving the United States of America? It's probably half a million cases.
Quite easily, presuming the court in which you are suing (or the government directing that court) allows it.
Enforcing a judgement is an entirely separate manner, OTOH.