Justified? Yes. Morally correct? No.
I do believe the United States was justified in interning Japanese Americans during World War II. Japan was an ally of the U.S. at the time of the attack and Americans were screaming bloody mary how could our own ally do this??? Well we couldn't trust Japanese anymore and the best way to weed out the good Japanese American loyalist' (To America) was to imprison all of them. NO spies were found during the entire time they were relocated.
(It's only this long because it says College History so I am trying to fit the parameters of the requestee)