Why did united states citizens field that japanese internment camps were justified during world war two

Japanese internment camps were established during World War II by President Franklin Roosevelt through his Executive Order 9066. From 1942 to 1945, it was the policy of the U.S. government that people of Japanese descent would be interred in isolated camps.

The Japanese had just attacked Pearl Harbor (7 December 1941) US citizens feared another attack and war hysteria seized the country. Many feared the Japanese had connections within the U.S.