Well that’s nice that you made up your own definition…

Your distinction can make sense but not how you are looking at it. Saying murder is ancillary is ridiculous. The killers in those cases are not just wildly shooting in the air and it just so happens to hit people and kill them. Killing them is their intent. You could make an argument to split our random mass shootings vs targeted but there is still a pretty obvious base reason for both of those: ease of access to guns.