There was that unpleasantness with the internment of Japanese Americans, but that affected fewer people than the lockdowns.
It’s not the internment that bothers me. It was that many of those people went home to find they had lost their homes and businesses. They were quite literally taken from them by some locals.
Regardless of the number spies among the Japanese-American population, the internment was a huge violation of civil rights. They were forced to sell their property and businesses at fire sale prices.