I honestly think it's to do with media coverage of shootings/terrorist attacks.This graph is VERY alarming --- what's strange is that gun technology hasn't gotten THAT much better over the past 10-20 years..............so what has changed? Why are things ramping up almost exponentially in recent years? There hasn't been this amazing leap in gun tech, right?
Watch this video with a forensic psychiatrist who says that the way the media covers these events actually propagates more shootings to occur https://youtu.be/PezlFNTGWv4