Who said national law doesn’t exist? You break national law, decent chance you end up in prison. That’s real enough, even if not perfect. But what happens when you break international law? 99% of the time, nothing. And in the rare cases something does happen, it’s usually not really because of the law. It’s because countries have incentives independent of the law that make them enforce it. Often, the enforcement being illegal as well. That’s not really law, that is a bunch of outlaws shouting at each other with pipes in their hands, threatning each other.