It is easy to see why and how, AT THE TIME, it was considered appropriate, and again, I am going by information I have heard verbally first hand from Californians I know, Japanese and non-Japanese, who were contemporaries and personally experienced it, and who also experienced the reality that yes Virginia there WERE Japanese spies among us.
Your idea that it's clear in hindsight that the camps were an overreaction, is the natural conclusion if your knowledge and information on the event is limited. On the other hand, when you factor in things that schools didn't teach you but which you know were part of the context of the time -- then it's clear in hindsight that the REAL shame of those internment caps was the contemptible robbing thieving way that so many non-Japanese "businessmen" took advantage of the property and businesses that those Americans interned had to leave behind.
THAT was the shame, that was the evil, that was the wrong done to those Japanese. THAT is what hindsight shows very, very clearly.
THINK OUTSIDE THE BOX if you want to respect truth and preserve American freedoms righteously in the future.
You were taught to conclude that the Japanese camps were bad, malevolently inspired, wrong, BAD America. It's probably one of many such wrong things you have internalized as infallible.
It's not personal -- it's REALITY. Please, at least consider and mull my points. What I have written is TRUE.