What are the motifs in Martin & Malcolm & America: A Dream or a Nightmare by James H. Cone?

Towards the end of the book, Cone emphasizes that the black community needs the philosophies of both figures. King understood the importance of nonviolence resistance, forgiveness, love and the practicality of political reform on behalf of racial justice. However, Cone argues that King's middle-class background shielded him from the depth of the evils of racism and his Christianity caused him to place the excessive burden on blacks to forgive and love white people.