HARI SREENIVASAN:

There is also this feeling that, when an officer does try reach out to try bridge the divide and improve relations with the community — for example, in Pittsburgh, around New Year's, there was the chief of police there had posed for a sign in a coffee shop or something and it kind of went viral on the Internet. In the sign, he said, "I resolve to challenge racism at work, end white silence."

And, immediately, he got a lot of pushback from some of his kind of unions, saying, look, you just labeled us, all us cops, as a bunch of racists, and that's not fair.

Why is it that it's such a harsh dichotomy?