I mean you could look at it as plans are improving, people are getting better at stopping this stuff. I mean it’s super horrible and i wish it never happens at all but I’m thankful it’s 2 and not 50 like it used to be a year or two ago. I might be totally wrong though. Statisticians of Reddit, are mass shooting deaths going up or down? 
Just want to reiterate that my heart goes out to all of those affected by this and their families, random people don’t deserve to die for any reason whatsoever. This is horrible.