It behooves us to read a history of the Catholic Church's ministries to African Americans.  Wish I could recommend one off-hand but can't.  Having had personal experience working in the RCC with both minorities (also the American Indian), I can say it was mostly good.  The abuse & neglect must have been there too but I did not experience it personally.  I feel it's really important to be fair in our judgment of the Church while at the same time recognizing and repairing the abuses. On the other hand, it's my experience and  observation that the Church's hierarchy and priests largely stay out of the fray of race relations, working quietly behind the scenes in many good ways.