I believe in extensive background checks and thorough psychological screening of each person before a firearm purchase permit is issued.
Unfortunately I also believe that it has to be a federal standard and not in the hands of the state government.
There are people in this world that are extremely mentally ill, but without delusions. They know how to tell people what they want to hear while living a completely different fantasy world in their own heads. You’re never going to screen out the personality disorders that are cold hearted and violent. They can even hide that
from their families, with only little bursts of rage from time to time like anyone else. Most psychopaths and sociopaths are only diagnosed after some catastrophic self destruction that lands them in a court room on serious charges.
A lot of mental health evaluations only work on people that suffer from
like schizophrenia or manic depression, stuff that ruins their day to day life and they are honest about with a professional. It requires the patient to work alongside the professional.