I'm not black, but I grew up in a predominantly black neighborhood, and what I noticed was that MLK was considered soft. Many distinguished black fellows in my 'hood preferred Malcolm X and his ideals of separation and advancing those ideals by ''any means necessary'' as much more appealing than "I have a dream".
Also there is a huge stigma amongst some the inner city distinguished black fellows that equates eloquence, oratory ability, academic prowess, which MLK had, as being white.