The KKK is definitely a stain on our history.
I'd love to see a documentary on the internment of Japanese-American citizens during WWII, along with a discussion of the Supreme Court case Korematsu v. US. That case, along with Dred Scott and others, are counterweights to those who think the Supreme Court is infallible.
My mom grew up in Oregon during the Depression and WWII, and she told many stories of what life was like back then. When I'd ask her questions about the Japanese internment camps, she said nothing, despite my numerous attempts to elicit a response.
If we're going to truly educate our citizens, we need to tell the whole story, warts and all. IMHO, we need to tell that story, without viewing it through our 21st century morals and mores. We need more "interpreters" as we see at Monticello and Colonial Williamsburg, to bring history alive.
I agree about the idea of a story on internment camps. I remember working in a nursery in high school and meeting an ancient Japanese-American. It turned out that before the war his family owned the nursery and, due to the internment, they lost the business and now he was reduced to laborer in the business.