[piytar]

“’If some nut job’ should never be the employer’s liability.”

Yes it should if the employer makes the nutjob’s actions more likely and more likely to be more lethal. It’s similar to why you don’t let known pedophiles work in daycare centers (except in certain lib states where said pedophile’s rights trump kids’ rights not to be raped by law).

[SampleMan]

No. Why should anyone be responsible for the nutjob? Your problem is that you don't understand the fundamental problem concerning rights and liability.

If people weren't held liable for the actions of nutjobs that they have no control over, then employers wouldn't be incentivized to shield themselves to begin with.

Far too many people think that the problem with government intrusion is that they aren't the one's doing the intruding. They don't recognize that the problem is the intrusion itself, not its intent.

Think about that. Doing what you want without being held accoutable for the actions of others.