Like I said earlier, it's easy to demonize someone after he's dead. Also, if this kid was tormenting him so badly why didn't he tell anyone? Why did no one stop this before it escalated? Instead of bringing a knife to school to fight, why didn't the kid tell someone his bully was planning on beating him up that day? Why didn't he stay on the bus or tell the bus driver what might happen and ask to stay on it? There are a thousand things this kid could have done before using a knife to stab his bully.