Responding to "7 Guys Jump Asian Man" on Youtube

My Facebook newsfeed blew up today and last night with a Youtube video showing what looks like 7 high school boys jumping a Chinese boy.  Comments were mostly directed against the attackers saying things like, "I hope they get whats coming to them in prison" and "They deserve to burn for this."  It was absolutely brutal to watch and for this reason I won't link it here and don't recommend you watch it.  To think that people would actually treat someone like this is heart-wrenching.  My prayers go out to that poor kid.  This video has prompted so many different kinds of responses though, that I'd like to weigh in a bit and give my thoughts on how a Christian should respond to such a terrible thing.
 
Angry

People might expect a pastor to say the Bible says anger is a bad thing.  Let me say the opposite.  In this case, you should be angry.  For so many reasons.  You should be angry that an image bearer of God was violently attacked.  You should be angry that he was attacked for no good reason.  You should be angry that an innocent person was beaten.  You should be angry that seven people thought that ganging up on one person was not unfair or wrong.  You should be angry for the racism behind this as some of the attackers mock the Chinese kid for not speaking English.  You should be very angry about this.