Being a superpower means being free of ethics or reason. 'We are the good' sufficently summarizes a regular US-born worldview.
You also shouldnt be too naive to think, US citizens would bring up ethics or reason when choosing their leaders or commenting on their own countrys aggression.
Why do you think, the world is unfair? Some decades ago, we had a world police.
Don't be naive and think that there's natural justice and the world is fair.