After watching this movie, I thought two things.
1) It was a bit slow and foreboding but balanced and kind.
2) I must give up my life to the welfare, amelioration, well being, dignity and love for the place African-American Men (Black Ones) hold in this society.
Movies, I have always maintained, do NOT have the ability to inspire or change people. At the end of this movie, I felt inspired to change. I was greatly moved. I was horrified. Furthermore, you get to know anyone, closely, and then watch them get gunned down for no reason, you just feel awful. And so at that moment of feeling awful, I was transformed. But after I ate, read the paper, switched my attention, I did not feel the great need to make my life about helping anyone.
You should see this movie. In fact, everyone could benefit from this movie. It is very effective, though, it is a piece of fiction (closely sticking to fact), one that has some tonal up-sweep mixed with a plodding march toward death.
Big emotions for an audience member don't hold. One wants to homeostate back to normal.
But if everyone was just a tiny bit changed by seeing this film, the world would change, true.
So, perhaps movies do have the ability to alter points of view. But it depends who is watching and how many of them there are.