Unlike serial killers, mass murderers were not a homogeneous bunch. People went postal because they’d had a bad day, because they were mentally unstable, because someone influenced them, because they were high/drunk/stoned, because they were in love/out of love/confused by love, because they sought glory, because they sought revenge, because they sought death. Mass murderers could be young, old, rich, poor, well educated, poorly educated, well adjusted, or loners. Their attacks could be random or well planned.
