At the time (the early 1940s), most Americans were unaware of them, or had only the slightest knowledge that Japanese Americans had been moved from the west coast. There was no clear opposition--the United States was fighting for its life and most people were prepared to support virtually anything the government decided to do that would advance the war effort and protect our country.
I'm not agreeing with the interment camps--history has shown that they were a very bad idea, and weren't at all needed.
