Start with history of blacks in the Mormon faith....
Ah yes the antislavery stance caused an uproar in Missouri.
And what of the history of blacks and women in every other faith? Are you not aware that some of the reason that Mormons were mistreated and driven out of some areas is because of their opposition to slavery. Are you not aware that blacks were allowed baptism into the Mormon church since its founding? Nearly every Christian church in America has a history (around the 18th and 19th centuries) that discriminated against blacks and normally for no doctrinal reason, just plain prejudice and bigotry. Mote. Eye. Beam.