Very positive.
Negative, First of all it should be All Lives Matter or Stop Police Brutality as police brutality affects everyone, and 2nd and most importantly its been turned into an attack everyone but Hillary group
First of all, blacks are disproportionate victims of police brutality in this nation. Suggesting that movements to stop police brutality should just ignore the racial aspect of the issue is suggesting that they ignore half of the issue itself. It downplays the importance of the racial disparity in police brutality cases. It also downplays black victims themselves by implying that blacks face a relatively equal burden as whites (or any other race) as victims of police abuse of power.
Second of all, as others have already pointed out, BLM has protested at Hillary events as well. This movement is not about the Democratic primary, believe it or not, but about one of the biggest civil rights issues of our time. The idea that the 'most important' factor in your opinion of BLM is the fact that Bernie Sanders allowed 2 people who identified with the movement to speak out at his event is really laughable considering what this movement is actually about.