Good observation, Jacklemae
By celebrating him as a "black leader", it can perpetuate segregation for some. But we have made progress. You have to remember, though, that while slavery was abolished long ago, it was only a few decades ago that true equality was implemented. There were Jim Crow laws that prevented blacks from participating. The KKK was a huge force in the South, but now it's a small group seen as an embarrassment we'd rather not talk about. There is still racism, but comedians like Bill Burr, Louise C.K., Chris Rock, Sarah Silverman, etc help us see the stupidity in it. As each generations comes and goes, we become more and more of a melting pot. And, as each generation realizes that what's considered "racism" is really "socio-economicism"... well-off people like bagging on those struggling in order to feel better about themselves. There's always going to be some rich douche revving his sports car at the traffic light next to a car load of black folks. But that same douche is going to bag on trailer park rednecks, too at the office water cooler. It just happens that blacks have been the ones in poverty for the longest time, since they weren't allowed the opportunity to rise up and do something better. But now that they have, many are. But there's always going to be poor folks. It's just the mix is evening out to have more white folks being poor, too.
As for the flash, the auto-tune was pretty good. However, MLK day has sort of turned into like "Oktoberfest" days and such. People celebrate it superficially, then get on with their lives. They don't really give it much thought. They don't delve into his greater purposes. They just think "oh, yeah, he was such a great black leader!", then move on. They don't really hear what he's saying, or look at what he helped accomplish. And like you said, he wasn't a black leader...he was a leader.