Do you think the only people acting these things out are "psychopaths"?

Yes therapeutic intervention is ultimately how you stop these things from progressing but if you've gotten to the point that people see your threats and they seem plausible you need law enforcement and the judiciary involved deciding if you need to be removed from society not just a pat on the head from a social worker. Ideally you can get the help you need incarcerated.

At minimum this Florida woman needs to have her rights to own a firearm removed and be put on probation and in some kind of court ordered therapy.