This is late, but sorry America was an evil empire at that time. Remember Agent Orange? Remember carpet bombing? Do you remember invading someones country because their political ideals were different? This is not a reminder of humanity.
I had mixed feelings about this also, but it does give a quiet reminder that even our most hated enemies have loved ones too. Something that is really easy to forget. 5 Letters from Iwo Jima, doesn't make us an evil empire, just reminding us of humanity.