LBJ, like BO, was an a**hat who despised Churchill.
What problem did LBJ have with Winston Churchill? From what I know of their respective careers they never crossed paths except fro when Churchill addressed Congress for the second time in 1952, I believe it was.
BHO undoubtedly knows what Churchill thought of blacks, all blacks, not just American Negroes. There are two pretty explicit albeit brief indications of this in his doctor Lord Moran's very revealing book about Churchill as a patient. Churchill was PM when the Mau Mau trouble was going on and let the colonial authorities smash the uprising with really iron fisted tactics (appropriate ones IMHO).
Incidentally, whatever Churchill's family thought was an outrageous breach of doctor=patient privilege this book makes WSC a real hero. Tough, tough old man sloughing off strokes and heart problems and pushing on. Even though WSC was dogged with depression his whole life. Read the book and come away humbled at how much a battler Churchill was.
Churchill saw the relationship between roosevelt and $+@l!n up close. He was under no illusions about saint franklin.