I think you are right about the gp's motivation, but it's really semantics. I would have called the guy selfish, cruel, maybe evil even, but probably not a soci

I think you are right about the gp's motivation, but it's really semantics. I would have called the guy selfish, cruel, maybe evil even, but probably not a sociopath or insane. Most murderers are not sociopaths. But when scared or angry empathy is impacted in even normal people. If that anger does not dissipate over time either due to repeated offense or reminders of an offense, an otherwise rational individual can have their empathy suppressed long enough to plan something like this.