Some countries are assholes. They trample on international norms about human rights, weapons trafficking, maritime borders; sabotage negotiations to end civil wars; bully their weaker neighbours; and so on. They make and break promises repeatedly and shamelessly, and complain with violent indignation if they are challenged for it, all the while declaring their commitment to the highest ideals of international peace and cooperation.
You know the kind of country I'm talking about. The kind that believes in its own moral exceptionalism: Not only does it not feel bound by the ordinary rules; it even demands that other countries acknowledge its moral right to set its interests above their own or the international peace. Russia is an obvious current example. I'm sure you can think of others.