That behavior by Jai was uncalled for, and I would never condone it. However, that behavior does not negate Jai's accomplishment's in the sphere of dance. Some people can be poor personalities, but great at their jobs.
As harsh as it may sound, I think no matter what age you are - being subject to some of the lowest forms of human behavior (worse than what Jai did) is the part and parcel of being a celebrity. That is why very few child stars end up having successful adult careers. Most are mentally unprepared and resort to drugs, sex, alcohol or are wise and just quit.
No matter who is the cause of bad behavior or criticism, I always place the blame squarely on the parents. Parents ought to know if the child is ready or not, parents ought to be prepared to be a super strong support system, and parents ought to plan for the worst. I think the most abusive people in my view are parents who put kids in reality shows to fulfill personal notions of fame and glamor, and are not honest with their kids about their abilities.
Although I strongly feel about people referring to what Jai did as "child abuse". Child abuse is a very grave and serious concern. There are children out there experiencing horrifying forms of abuse from parents, teachers, families or even siblings and peers. This ranges from verbal and mental abuse to things as bad as rape and incest. No matter how horrible one thinks Jai's actions are. Referring to him as a "child abuser" is actually demeaning to what child abuse really is and what some unfortunate children are actually going through. I think people can call him prick, jerk, douche whatever for it. I'm fine with that. But out of respect for the issue of "child abuse" I think that term should not be used in this context.