Why does it have to be all at the same time in a single rampage? Some killers do it over time. No guns required. Arsonists can kill dozens of people at the same

Why does it have to be all at the same time in a single rampage? Some killers do it over time. No guns required. Arsonists can kill dozens of people at the same time as well. No guns required. The point is the problem is the person not the tool.