Short answer: Remove Obama from office. He is the single, most divisive factor in the current worsening of race relations and is working every day to foster violence between the races.
When BO was running for office, hubby and I had a conversation about this very subject and my hubby stated firmly that he believed race relations would worsen if he were elected. I believe he was quite correct in that assessment.
I, as a "white" person have absolutely no ability to change "race" relations. Anyhing I say will be dismissed. The only way for blacks to do anything about "race" relations is to look in the mirror and honestly assess what is going on in their community. I can't make their young men and women rediscover marriage and it's benefits for both adults and children, not to mention the larger community. This section of our society decided that Daddy Government was all they were going to need, and that decision destroyed their community. Only they can undo what has been done.
Then, when their young men have been raised in families with a father present, I think we will begin to see better relations (with everyone, I don't think just "white" people have trouble with young black men).