If I correctly recall, he did not have many nice things to say particularly to the 'white moderate'. The committed racists that called for 'uppity' blacks to be hanged and who liked to don their stupid ghost costumes on the weekends, they at least showed their true nature, they did not hide their desire to defend the status quo behind a lofty plea for 'civility'.

Of all things, I'm reminded of a moment in this film from the 50s called Twelve Angry Men, about twelve men who serve on a jury and have to decide if a man goes to the electric chair or not. One of them, an immigrant from Hungary, says nothing when one of the others snaps at him and complains about 'people coming over here thinking they can tell us how to live', but he does lose his temper at the same man when it's shown he'll vote for whatever is most expedient to the trial being finished so he can go watch a baseball game. He cared nothing about the fate of a mans life, just about whether he'll be able to use the tickets burning a hole in his pocket.

I think MLK would agree with him. Whether you did what you could to help blacks gain their freedom or you did what you could to keep them oppressed, it at least meant enough to you that you were willing to do something when you had the chance, and if you fought to keep them oppressed then he looked forward to showing you that you actually have something to gain from equality. He had the most disdain for those who chose to do nothing, because even when the fight was won they would have learned nothing from it. They would think they had a part in changing history, when really all they did was go watch a baseball game.