yeah the crazy part about that is one uncomfortable point many through history (and in threads today) have made is that nonviolence implicitly assumes a moral audience. And that injustice, once clearly exposed will provoke people's conscience.
History obviously shows that that "moral audience" was certainly the minority then.
MLK was already forcing that confrontation and by most accounts was succeeding slowly-but-surely. But it wasn't until his assassination that people were forced to confront the contrast he had been trying to illuminate all along.
Even his disciplined non-violence he was met with brutal force (as were the peaceful protesters) and this forced some sort of moral reckoning for those who had deferred or were complicit
https://www.youtube.com/watch?v=YKnJL2jfA5A&feature=youtu.be