This document is about the condition and the treatment that the Japanese were subjected to in the concentration camps following the war US had with Japan.
The summary of the excerpt
The summary here is that the writer is speaking on the way that they were treated in a supposed land of liberty and the free.
From his tone, we can see that he is appalled given that he was born in the same United States. He described the treatment that the people were made to go through as very bad.
From his tone I think he is trying to show the irony in the fact that the US could call itself the home of liberty and still treat people this way.
Read more on American Japanese war here: https://brainacademy.pro/question/805452