This type of attack doesn't happen everyday. Victim has life changing injuries, loses his eye, probably lucky to be alive. He was probably just going about his day.
I don't condone rioting either but at this point I'm not surprised now. Surely nobody is surprised. These types of attacks are happening all too frequently and people get pissed off about it. But all that ever happens is it gets forgotten about, we move on, until it happens again, then people riot, then the murder that started it all gets forgotten about..