Here's my two cents: Physically assaulting somebody for calling you a name puts you in the wrong. It's a symptom of being emotionally insecure, being sent into a violent rage at a verbal sleight.
In the real world, if you attack somebody for calling you a name, you run the risk of getting an offense, and anyone who witnesses or hears about your deed will think you're unstable and or dangerous. The fact that you're enabling this mentality that the white kid with long hair was somehow responsible for the black kid's disproportionate reaction means a lot.
Honestly i haven't seen the video and I wasn't responding to the video but rather Rally, so i'm not justifying anything.
When you punch someone for calling you a name, both parties are in the wrong, but it was clearly provoked by the person who called the name. In the eyes of the law it's obvious that the one who physically assaulted the other will receive the charges, but in the end it's not something you can easily control.
Unfortunately for us, humans have something called emotions, and when a human being is upset by an insulting word or verbal abuse, they tend to lash out at the source. It's not justified but if you're the one verbally abusing them, you should already know what kind of reaction you're going to get out of them, and you should already know that you're going to end up in the hospital.
The connotation of the insult is irrelevant, the insult doesn't cut deeper than a smack to the face.
The insult is the catalyst which causes the smack to the face. Whoever is the catalyst should understand the outcome of the situation and understand that the reaction of the other party is entirely their fault.