What is the most reliable source for describing gordon hirabayashi's reasons for resisting evacuation?

The most reliable source would be the Note that he personally wrote, which basically said that he:

- does not want to sign up for evacuation because it is basically signing away his freedom

- innocent people are being punished

Gordon was one of the Japanese descendants that are forced to evacuate following the attack of the Pearl Harbor. He refused the process and eventually thrown to jail.