Thank you Mr. Robinson; the 2nd Amendment does indeed apply to African-Americans and the silence from the NRA speaks volumes about how they view this. This terrible incident blows enormous holes in the "good guy with a gun" argument we have all been fed. Johnson was a "good guy" until he snapped. No matter what his private ideology was, he was able to legally purchase and carry firearms. There were other armed "good guys" in the crowd none of whom were able to stop this. Somehow, the amazing Dallas cops managed to avoid shooting any good guys with guns but the presence of those armed citizens cannot have made identifying the shooter any easier. Until we start valuing life and condemning the mind set that allows people to think they can solve every problem by shooting someone we will not move forward. 
BLM exists in response to endemic racism in our legal systems; address that racism and BLM supporters and police will all go home safely.