That kind of gets to my entire point. Of course it's not consistent application of Justice if it dictator can commit genocide and escape to another country. Everyone will agree that in a perfect world they would undergo trial and be sentenced. We don't live in a perfect world and have practical constraints.
Like I said above, what are you going to do if a dictator flees to another country? Invade it and go to War with it?
Is Justice against one individual worth sacrificing tens or hundreds of thousands of lives? Would that be Justice?