Yes he is entitled to an opinion, and yes his post were provocative , but what I saw posted were definitely condescending, had racist undertones, and looked to marginalized the plight of african americans in the country today.
His posts were not "PRO- BLUE LIVES MATTER" like media is stating, look at what he posted, it is Anti - Black Lives Matter. The point of those post are to put down the BLM movement that wants to bring social equality to african americans.
IMHO, people who are vocal about being anti-BLM tend to be provokers and aggressive to make their opinion known. I know they did not say it but I won't rule out an aggressive argument that escalated, I feel that is more likely than targeting because of 2 Facebook posts. We hear one side and obviously it's going to be one sided.
Violence is not the answer, ever, Police and the community need mutual respect and understanding, we need to work towards that.