Question

Was President Roosevelt justified in ordering Executive Order 9066, which resulted in the internment of Japanese American citizens? It's an essay btw.

Answer 1

This is a matter of opinion.
If you think yes, you could argue that internment was a great PR move and/or that it protected the Japanese living in America from negative press
If you argue no (which I would) then you could argue that it was unconstitutional and/or had no strategic importance to the war itself.