How did the US justify the internment of the people described in this excerpt?

The US justified the internment of Japanese Americans during World War II primarily through national security concerns, claiming that individuals of Japanese descent posed a potential threat of espionage or sabotage following the attack on Pearl Harbor. Government officials argued that the internment was necessary to protect the country from possible subversion. This rationale was further supported by wartime hysteria and racial prejudice, leading to a widespread acceptance of the policy despite the lack of evidence for any actual disloyalty among Japanese Americans.