Childrens books on the Holocaust and on slavery are unnecessary. Yes.
Write the books, get them past the govt censor...sell them in bookstores...let parents/guardians decide what their children read.
Such books in schools?
Not until the students are at least 15+.
Students would probably be better off studying geography books...learning that the largest country in South America is not Africa.
Teach little kiddies about the Holocaust?....stand by for the nightmares, depression, mental illness that will most likely follow.
Ditto slavery.
Children deserve a childhood.
Not nature videos where Bambi is torn apart by lions, either.