How did the court justify military orders that sent people of Japanese ancestry to camps?

In the case of Korematsu v. United States (1944), the Supreme Court ruled that the military orders that led to the internment of Japanese Americans during World War II were justified by military necessity. The Court argued that the government had a legitimate interest in protecting the country from espionage and sabotage, and that the exclusion of Japanese Americans from the West Coast was a reasonable measure to achieve this goal.

The Court also held that the orders were not racially discriminatory, since they were based on the location of people of Japanese ancestry rather than their race. However, many critics have argued that the orders were in fact motivated by racism and xenophobia, and that the Court's decision was fundamentally unjust.

It's worth noting that Korematsu's conviction was later overturned, and in 1988, President Ronald Reagan signed the Civil Liberties Act of 1988, which provided reparations to Japanese Americans who had been interned during World War II. The act also acknowledged that the internment was a grave injustice and a violation of their constitutional rights.