Terrorism is out of the question here. But I don't know what the religion of the boy is, and as I have suspected, the kid has difficulty integrating with the schools and have issues with some of this fellow students. But the important thing to notice here is, how the hell the boy have so many weapons in his arsenal and just walking around school premises with it? France has a very strict law on guns and needed permits to get one. So I think the need to review their law and investigate more on how the kid get his gun. Good thing that no one died, but the next time maybe they would not be so lucky.
Parents now pay very little attention to their children and therefore there are some moments when schools are bad for children, a bit unlike others or in other situations, some are trying to offend others severely. This should not be. The words of young people are not considered and can cause more harm to the psyche. Therefore the offended take up arms.
Hmm. But I think you got a point. Parents now are also busy with their own life like business or work that they tend to not give their kids the needed attention. Although this is more happening in a progressive country like France or US. I haven't heard any news of shooting or taking up arms in Asia for example. I know bullying is all over the world but it always happened in somewhere in developed country. I supposed those parents in progressive country has issue tending to their kids when growing up. This is evident in some Hollywood movies.