Rather than simply asking for black votes in October 2016 after having taken them for granted up to that point, Hillary Clinton or Bernie Sanders will possess the credibility that comes with having earned those votes. At that point -- if not a lot earlier -- the Democratic Party and its nominee will need to thank #BlackLivesMatter.
One of the more difficult things to do, for many of us at least, is to react in the moment, when injustice is occurring right in front our eyes, but in a way that does not directly affect us. The "safe" thing to do is avoid the conflict, to get away and certainly not get involved. However, there are times when the safe thing to do is not the right thing to do.