Is Newtown Making Such News Because The Kids Are Mostly White?

[Nikia]

100. Except few of those murdered are small children

Most of the murdered are adults and teenagers. Many of the teenagers that are murdered are not so innocent in that they are involved in crime. That is not to say that the teenagers deserved to die but they were involved in activities that put them at an increased chance of being murdered and make other people less sympathetic towards them.
Having security and police in schools has been effective in preventing murders, less severe violence, and criminal activity in general. Teachers and most students feel safer because they are safer. Many of the murders engage in other illegal activity so obtaining illegal guns wouldn't be much of an issue.
Gang violence is an issue, but everyone knows that gangs are dangerous and that it is safer to not get involved in them. It may be in some neighborhoods that young people are pressured to join gangs, even to the point that their life is at stake. Sometimes, innocent bystanders do get killed as well. There are some groups working to address that issue, but I don't know if there is an easy answer.