These very close advisers and speech writers of MLK are believed to be responsible for King's hard swing to the left during his last few years of life.
They had assumed that African-Americans were the perfect "American Proletariat." The strong religious orientation of the group at the time, family structures, and their devotion to the Republican Party (!!! check it out!) defeated the commies at ever turn.
As the Truman style Democrat, i.e., patriotic working people, phased out and the Left took over the Democrat Party, The Welfare Lifestyle and the eventual destruction of African- American mores phased in.
Somehow, in one of American History's greatest ironies, the Democrat Party became, in theory, the party of Civil Rights in the African-American mind. A more dispassionate look might show a reasonable onserver that the Democrat Party had fought civil rights since 1865. Joining the Southern Democrats at every turn were the Northern Democrats like JFK, whose voting record on "Civil Rights," particularly in his unwavering support of segregation, was atrocious!
However, the truth be damned! The Left, and the Communists (an overlapping membership) have succeeded beyond their wildest dreams. The African-Americans are 100% Democrat, their votes bought and paid for by the party of segregation.. Communists like Van Jones are appointed to high office by the most radical Left Wing President in History, whose communist connections are far stronger than those of MLK, which were bad enough!