You didn't read very carefully. The change in skin color that was a curse on a group of people in the Book of Mormon was a reference to the Indians, not negroes.
Thank you for your entry. The term "indian" is very broad and has had different meanings over the last 150 years. Kind of like the two words native and American which were put together in the 1930's to become a new phrase. The curse you describe, I believe, is the curse of Cain. The following site is one of those I used for information on the segregation subject.
http://www.lds-mormon.com/racism.shtml I find all segregation intolerable. And it still permeates out world. It seems that any time people start to worry about their differences, they automatically fear others for theirs. Think how successful we could be as a race, the human one, if we weren't so damned different. We aren't, we just make ourselves so. And it's organizations like the Mormon Church that help the issue along, under the disguise of God. Hence, part of my dislike.
Merry Christmas
Red