anime

It's main message is to always keep moving no matter how bad things get, and to not lose your humanity in the pursuit of power or control. The messages about the Ishvalans are more that genocide is never for the advantage of the citizens of the country committing genocide, but for the goals and power of the rulers. I think you're forgetting that germany committed a few genocides in Africa and the Middle East before WW1, which makes the loose metaphor more clear than trying to impose american actions from much later onto it. There's also a lot of "don't be blindly obedient to authority, and fight your government if it is evil" messaging, which is vague and not as radical as we would like, but better than most liberal shows.