I tried to make the point earlier, the people to blame are the ones that constantly dismiss, trivialize, or deny issues if race when these things happen. They feel vindicated that the white cop was not charged and then mock the people who protested and rioted. They view racism in a vacuum and in a case by case battle instead of viewing racial issues as a whole.
They try to sweep modern racism under the rug and blame Al Sharpton and Jesse Jackson for fostering the racism and make every attempt to absolve white people from accusations of racism or racial bias.
They preach about how we "shouldn't care what color the police and victim are", or ask "why is everything about race" or say "they are playing the race card"
And as they do this the powder keg grows. Anger at having their concerns snuffed out as a black community problem and not reality. Anger at watching their black kids go to jail more and get longer sentences than white people. Watching black people gunned down in the street.
Then when it explodes some white people act shocked, or offended, or turn the blame to the black community for rioting.
You can't keep blaming the victims because eventually they will decide "You dont give a sh1t about me, why should I give a sh1t about your property"
Pretty much a positive feedback loop. There's nothing to condone about reacting to violence with violence but somebody tell me what is the answer then when they could peacefully protest until their heart's content and nobody who isn't a part of that community cares one bit?