I'll say this and I'll keep it simple - nothing will change in this country until both those who perpetuate right wing propaganda and the politicans who enable these types of incidents with policy are held accountable. They and their families have to live in the same fear we do as black people in this society, plain and simple.
Note that the gunman did this during the March on Washington anniversary. This was symbolic and purposeful. These types of incident will only grow in frequency, especially with Trump facing criminal charges. Many judges and prosecuters presiding over his cases are black people. White nationalists see this and are seething with rage. Stay alert and armed. Be cautious and hyper vigilant around strange looking cacs