About the medias affect on mass shooters. I'm Finnish and back in 2007 we had the Jokela school shooting. The guy watched news videos about American school shootings and openly admired the shooters so I'd say you're spot on about the media making the shooters famous. He also used a .22LR target pistol instead of a scary black rifle.
Honestly that doesn’t surprise me with the .22 rifle, one of the largest shootings in the US was Virginia Tech and that was done with a Glock 19 and a .22 target pistol. I feel it’s a mixture of the media’s fixation on shootings that makes a cycle of copycats and an unwillingness to look into mental health outside of just medication.