Totally unfair statement. You don't need to be armed to be a threat to a cop. Michael Brown was unarmed and got what he deserved. The cop in South Carolina killed an unarmed guy and is getting exactly what he deserved. In Baltimore, we have no clue what happened yet.
It's all situational.
Why aren't blacks protesting about blacks killing each other on a daily basis? Black lives matter only when killed by a white guy?
Well, let's see why that might be? Blacks who kill blacks, and are caught, are prosecuted. Many law enforcement officers who do so, aren't, despite there being, recently, a considerable amount of evidence that the killings weren't justified, not to mention, that the abuse is systematic, as shown in the Justice Department article that I posted-and, which is why over a half dozen officials connected with Ferguson were forced to resign, asshole.