If you bother to actually get well informed, it was not only Japanese, but Germans and Italians as well.
And it was NOT everybody, only certain categories. And there were ways to avoid internment, one being military service.
And in the west, it was not controversial. People understood it was protection against a risk, plain and simple.
In retrospect it is easy to criticize. In real time, not so much. And finally nobody got abused in the camps. Maybe their feelings were hurt, but that was the limit.
I knew some people that came from internment families. Two in particular, in my cohort, and served in the military during Vietnam.
There are times when we need to decide if we let the Constitution be a suicide pact, or a pragmatic practical guide.