It's part of the reason for the protests, however. His point of view is that the DA acted "oddly" and because many town residents do not trust law enforcement, based on prior actions, this appears is if its the DA protecting Wilson. This, of course, is the bigger issue.
That said, I agree with the decision. And if the DA sent it to a grand jury because they were afraid of the backlash if they didn't, I understand. At the end of the day, a man attacked a police officer. It shouldn't surprise anyone if that person gets killed.