We dismantled the mental healthcare system. We dumped the insane out on our streets...making them homeless, or forcing unqualified, unfunded, overstressed families to care for them...with obvious and predictable effect.
We can't put them back. The Left use them to try to pass gun control, so they need them out there. The Right fears they will be detained for mental tests for their "crazy" political views, having been reported to the police by progressive activists.
So, get a concealed carry permit. We are in this for the long haul, I'm afraid.