Why Mormons will see Blacks as "Cursed" Is something I could never be comfortable with when I was a member. I have heard many explanations about this and I still do not buy it. The church may not hold the same position now but back then a lot of Black believers were denied full 'honor'.
President Dallin H. Oaks, first counselor in the faith's First Presidency, said he was among the white American church members "Who felt the pain of black brothers and sisters and longed for their relief" before the restriction was lifted in June 1978 by a revelation received by leaders of The Church of Jesus Christ of Latter-day Saints. Source 6e.