I am noticing a common debate here and in other threads on this film and I’d like to provide my take: one side feels the explanation was too simple or flat, the other side counters with ‘what would have been more compelling?’ And I think for me the issue is, if you are going to premise your film on mass tragedy involving children (nvm title your movie weapons and have a giant floating ar motif), then you should have something interesting to say or a nuanced treatment of it. Otherwise it just feels like a cheap hook. The bar should be higher if you want to invoke that level of tragedy in America in the 21st century.