First question MLK was asked on Meet The Press: "Aren't sit-ins hurting the negro cause?"
The transcription isn't well done, but this is interesting when compared to BLM.
http://www.dailykos.com/story/2015/08/14/1412113/-The-first-question-MLK-was-asked-on-Meet-the-Press-Aren-t-the-sit-ins-hurting-the-negro-cause
[Lawrence Spivak]: Dr. King, the former president, Harry Truman, recently
said this, and I quote, “If anyone came to my store and sat down, I would throw 1960 him out. Private business has its own rights and can do what it ants." Now, Pres-
ident, former President Truman is an old friend of the Negro, I believe. Isn’t this
an indication that the sit-in strikes are doing the race, the Negro race, more harm
than good?
[King]: No, I don’t think so, Mr.Spivak. First, I should say that this was an unfortunate statement, and we were very disappointed to hear the president, the former president of the United States, make such a statement. In a sense a statement like this serves to aid and abet the violent forces in the South, and even if Mr. Truman disagreed with the sit-ins he should certainly disagree with them on a higher level. Following his past record, it seems to me that Mr. Truman wouldn’t have faced such a situation because there wouldn’t have been a segregated store in the beginning if he were running it, according to his statements in the past. Now, I do not think this movement is setting us back or making enemies; it’s causing numerous people all over the nation, and in the South in particular, to reevaluate the stereotypes that they have developed concerning Negroes, so that it has an educational value, and I think in the long run it will transform the whole of American society.
[Spiuak]: Well now you have yourself have said that the aim of your method of nonviolent resistance is not to defeat or to humiliate the white man but to win his friendship and understanding. How successful do you think you have been, or are being, in winning the friendship and understanding of the white men of the South?
[King]: Well, I should say that this doesn’t come overnight. The nonviolent way does not bring about miracles, in a few hours, or in a few days, or in a few years, for that matter. I think at first, the first reaction of the oppressor, when op pressed people rise up against the system of injustice, is an attitude of bitterness. But I do believe that if the nonviolent resisters continue to follow the way of non- violence they eventuallyget over to the hearts and souls of the former oppressors, and I think it eventually brings about that redemption that we dream of. Of course, I can’t estimate how many people we’ve touched so far; this is impossible because it’s an inner process. But I’m sure something is stirring in the minds and the souls of people, and I’m sure that many people are thinking anew on this basic prob- lem of human relations.
= new reply since forum marked as read
I can't get over the impression that somebody in America is trying very very hard to drive a wedge
between white Progressives and African Americans, and I do not detect a "grass-roots" source.
JMO private suspicions.
United, We The People have a chance.
Divided, we're Toast.
A good question to ask:
What and for whom is the cui bono for dividing those groups?
I am beginning to think that some self-described progressives are deeply invested in what benefits the white, straight, male segment of the 99 percent and do not like pesky distractions. Could be a belief in trickle-down or a rising tide lifts all boats. After all, anyone who march with Dr. King would certainly share the wealth after they got theirs. 
however I did not mention or mean specifically Sanders supporters. There are some self-described progressives on DU and elsewhere who come across as being sexist, racist and/or homophobic regardless of the candidate they support.
Thanks for mentioning it.
Thats what I thought you meant. 
http://wagingnonviolence.org/2015/08/black-lives-matter-protesters-commemorate-michael-brown-in-new-york-city/
Hundreds of protesters hit the streets of New York City, along with cities across the United States and overseas, for multiple actions on August 9 in memory of Michael Brown, who was killed one year ago in Ferguson, Missouri by police Officer Darren Wilson.
Brown’s death at the hands of Wilson last year sparked riots, protests and the birth of the Black Lives Matter movement.
To commemorate the death of Brown, multiple U.S. cities, including the town of Ferguson itself, held rallies and marches. Activists in New York City held three separate actions, ensuring that streets from downtown Brooklyn up to the Bronx would see protesters taking them over. And in addition to remembering Brown and the town of Ferguson, the protesters used the occasion to draw attention to the city’s police problems and other incidents of police violence against people of color since Brown’s death.
“This protest will not only remember Michael Brown, but will demand an end to the racist police terror that the black and brown communities face each day, as well as salute the brave uprising that moved many into action,” the Peoples Power Assemblies, one of the groups that helped organize an action in Brooklyn, said in a statement. “The demand to an end of police terror will include an immediate stop to the daily brutality and deaths at the hands of police — whether at traffic stops, during broken windows harassment or in jail cells.”
I think #blm should completely ignore Sanders and instead put pressure on folks like DeBlasio.
Hate to harsh the far left's giddy - but Federal Gov isn't going to help black folks - we need to punch up from our local government and work around Federal Gov. Fed Gov is D.C - and inside the beltway - if they were worth anything - none of this would be necessary in the first place.
