I do not think it is just an odd coincidence that most people have forgotten the economic, political, and social militancy that came with the Civil Rights movement in favor of a disney-ified[0] version where mere marches, willpower, and belief in a certain set of principles caused widespread change.
[0] http://inthesetimes.com/article/14524/santa_clausifying_mart...
I'm very much aware that MLK had a larger vision for shared economic prosperity, a vision for "a beloved community," that is very much sanitized by the mainstream narrative. The article you posted doesn't really do service to telling the actual message. I recommend this On Being interview where Vincent Harding [0] gives an overview.
0. http://www.onbeing.org/program/vincent-harding-is-america-po...
Whimsy is not what I advocated. If that's how it came across perhaps I chose my words imperfectly. I'm trying to figure out secular, modern ways of building community. MLK used the power of religion to build and sustain his movement. And to pretend that it didn't successfully create change is historical revisionism.
0. Letter from Birmingham Jail - Martin Luther King https://www.africa.upenn.edu/Articles_Gen/Letter_Birmingham....