Final answer:
Dr. King does not believe that church leaders advocating for desegregation solely based on its legality is enough. He wants them to also recognize the moral importance of integration and the equal humanity of all individuals.
Step-by-step explanation:
Dr. King does not feel that church leaders telling their people to obey desegregation because it is the law is enough. His disappointment stems from the fact that he hoped the church leaders would also advocate for desegregation based on moral values and the recognition of the equal humanity of all individuals. He wanted to hear white ministers say that integration is morally right and that African Americans are their brothers. For Dr. King, it is not sufficient for church leaders to rely solely on the legality of desegregation without also recognizing its moral imperative.