"Black people always make a mess out of things"
Mike Brown was literally chased by the cops, and after they ordered him to lay down, WHICH HE DID, they shot him immediately, went to his corpse and shot him several more times for god knows what reason. The cop who did it, lied about how he was struggling when there are multiple eye witnesses to say otherwise, but because they're black, their words don't do much.
The cop also changed him name on Facebook to "Scooby" and said stuff among the lines of "Now they'll never find me" in the comments of his profile picture.
People weren't even rioting, they were peacefully protesting, literally standing with their arms in the air begging for the police not to shoot them. And what did the police do? Throw teargas and rubber bullets at them, injuring even the media.
It's much more than "black people always making a mess out of things"