We should teach our kids that they need to accept and be nice to others regardless of their strengths and weaknesses. They should be taught not to judge a book by its cover and coexist with all kinds of individuals, but not to be mean or cruel to them. Dylan Clebold and Eric Harris was abused and mocked on a daily basis at school, and that's what caused them to retaliate by murdering everyone there, until they ended up taking their own lives. I'm not excusing them for their actions, since their are more constructive ways to handle your feelings, but children have to be aware that if they are working at a job and there is a coworker there who they don't like because of how they look or talk, doesn't mean they must ridicule that coworker. They need to realize that they won't be able to get along with each other, but they have to manage to be in the same presence as the person they dislike for whatever reasons of their own. Kids must understand that there are most likely stuff about them that others don't like either, but they still should be civil towards them too.