In WWII, the US was at war with Japan. Many Americans we’re “racist” toward the Japs. President at the time, Franklin D. Roosevelt felt the need to send all Japanese people, even those born in the US, citizens, etc., to these internment camps, where they weren’t treated very well. The idea was so that they couldn’t be terrorist or spy on the people. Doesn’t matter how you look at it, that’s what it’s about. I don’t think it was a good move, but I also don’t think that modern day democrats should really be blamed for it.