Racism in its true form is ugly and unneeded in this age. I don't know how they are planning to curb these behaviours, the deterrance should have happened by now by the parents, society and their teachers.
People want something to blame for their station in life, or events in general outside their control.
A mob of one ethnicity attacking members of another ethnicity wholesale is akin to Kristallnacht no matter who is doing it to who.
The problem lies in one group or another feeling they have justification for their action.
The problem is while that side is getting what they feel is "Justice" they simply created that same mentality in the people they victimized. I wouldnt be surprised in the least if many white observers of this story or victims, develop a lifelong hatred for black people they will take to their grave.
Do you think for a minute after world war 2, if we had given all the remaining european jews weapons and unleashed them on an unsuspecting unarmed german populace to exact vengeance the people that participated wouldnt have committed the same horrible atrocities for which they were subjected to?
Some people don't have the ability to rationalize, i can recognize this was an Isolated group, and is not reflective of the people as a whole. I have friends of tons of ethnicities I know would never participate in an activity like this, and that is what keeps me level, Ive seen and experienced the good in everyone.
Not many people have relationships outside their ethnic background, and may not be prejudice, but a situation like this could stir it when they really have no personal counter example.
I think its almost impossible to stop though, there will always be groups of people that have this mentality, and even resonate to an extent with the majorities of all ethnicities.
Take Gandhi for example, renowned as a man of peace, humanitarianism and equality. The guy absolutely detested black people.