The main perpetrator got
8 years. The rest got varying sentences.
Without knowing the background to the case I can't see anything that would make it racially motivated, unless you take every case where it's an attack on someone of another rce as being racially motivated you need some proof. There are hundreds of reasons why a group of people decided to attack a person.
There are plenty of cases where serious assaults don't make the national papers. I know of at least 5 cases in the last year in the area where I work that have resulted in serious permanent injury and could very easiy of been murder that haven't been reported anywhere except the local rag.