I agree with you, though I won't go into what I think animates the Left ultimately, and how I think it is the same evil that animates the school shooter.
But my point was about how the media "advertises" this stuff -- even if partly inadvertently -- and is the very cause of the "copycat" phenomena; and it troubled times like ours, is an agent of malicious suggestion.
I definitely won't disagree with you that the "hype" and "drama" of the news can cause an unstable person to think about acting out, knowing that it might be their 15 minutes of fame. I won't agree with you, though, that there is a clear association between these shootings and the way the media has covered them.