While law in these circumstances is generally pretty complex, the rule of thumb is that on board a registered vehicle (that has not been hijacked or stolen) crimes committed aboard that vehicle even in international waters or airspace fall under the jurisdiction of the country where the vehicle is registered, unless that country for some reason cannot or refuses to prosecute.
Also, dude, no one is arguing whether anyone was in their right to “correct” their employee, why even mention this. What’s being argued is what constitutes any sort of sane definition of “correcting” said employee, especially given the minor quality of the error. Let’s refrain from even sort-of justifying, unnecessarily, the asinine behavior of the world’s entitled class. They contribute bupkiss and ruin everything they touch.