If anyone wants to see a great description of why I think we have mass shootings like this so frequently, check out the last episode from Legion on FX (season 2 episode 8). It had a spectacular segment at the end describing the allegory of the cave, and how technology is the cave and the people we communicate to online are the shadows. We reject that those people are real, and we also reject the real world for the one that we have come to know as real, but is really just shadows. That segment was some of the best and most relevant television I've ever seen.