From a sermon delivered by Martin Luther King on April 30, 1967:
My third reason…grows out of my experience in the ghettos of the North over the last three years–especially the last three summers. As I have walked among the desperate, rejected, and angry young men, I have told them that Molotov cocktails and rifles would not solve their problems. I have tried to offer them my deepest compassion while maintaining my conviction that social change comes most meaningfully through nonviolent action; for they ask and write me, "So what about Vietnam?" They ask if our nation wasn't using massive doses of violence to solve its problems to bring about the changes it wanted. Their questions hit home, and I knew that I could never again raise my voice against the violence of the oppressed in the ghettos without first having spoken clearly to the greatest purveyor of violence in the world today: my own government. For the sake of those boys, for the sake of this government, for the sake of the hundreds of thousands trembling under our violence I cannot be silent.
Been a lot of applauding over the last few years. They applauded our total movement; they've applauded me. America and most of its newspapers applauded me in Montgomery. And I stood before thousands of Negroes getting ready to riot when my home was bombed and said, "We can't do it this way." They applauded us in the sit-in movement–we nonviolently decided to sit in at lunch counters. The applauded us on the Freedom Rides when we accepted blows without retaliation. They praised us in Albany and Birmingham and Selma, Alabama. Oh, the press was so noble in its applause, and so noble in its praise when I was saying, "Be nonviolent toward Bull Connor"; when I was saying, "Be nonviolent toward Jim Clark." There's something strangely inconsistent about a nation and a press that will praise you when you say, "Be nonviolent toward Jim Clark," but will curse and damn you when you say, "Be nonviolent toward little brown Vietnamese children."
Full text here. King had more than one worthy dream.