From James Cone in Martin and Malcolm and America: A Dream or a Nightmare (1991):
King’s words have been appropriated by the people who rejected him in the 1960s. So by making his birthday a national holiday, everybody claims him, even though they opposed him while he was alive. They have frozen King in 1963 with his ‘I Have a Dream’ speech. That is the one that can best be manipulated and misinterpreted. King also said, shortly after the Selma march and the riots in Watts, ‘They have turned my dream into a nightmare.’
Mainstream culture appeals to King’s accent on love, as if it can be separated from justice. For King, justice defines love. It can’t be separated. They are intricately locked together. This is why he talked about agape love and not some sentimental love. For King, love was militant. He saw direct action and civil disobedience in the face of injustice as a political expression of love because it was healing the society. It exposed its wounds and its hurt. This accent on justice for the poor is what mainstream society wants to separate from King’s understanding of love. But for King, justice and love belong together.