Pistol whipped detective

I was somewhat perplexed by this. I understand that yes, police brutality is a sticking point in the media, but I also believe that officers have a responsibility to not let the media faze them in their duty. I feel very sorry for this officer, but they should operate as they were trained. Training does not seem to be an issue. It is unfortunate cops are being put in this position or feel that way. In my opinion violence is definitely needed sometimes when someone's life is in danger. I wonder what prompted the spectators to take pictures? And the rude remarks made toward the cop; are those due to general dislike for the police? Why bother to degrade public service members?