From my perspective, they need some good therapy, or something that functions as therapy under a different guise. Medications can help manage Sx, but unless they learn how to examine and work with their mind, they're basically going to spend their life feeling out of control and at the mercy of some combination of impulses/neuro-chemisty/exo-chemistry. It doesn't have to be called "therapy." But they need someone who can teach them how to work with the mind's deeper patterns and forces (and honestly, most therapists can't do this either). The only other place I know where this is done is in a variety of spiritual traditions.
That combination of Sx also basically screams childhood trauma of some kind. Basically they need to learn how to bring healing to the wounded place in themselves is, in a hidden way, driving most of their troublesome behaviors. I can't explain how to do that over text, but it is certainly do-able.
They might have to hunt around for the right techniques or teachers, but if they pursue it with dedication, it is attainable.
If these guys start messing with you on the street are you going to shoot them then and there? Really? I bet you wind up dead if you try it. I own guns myself, but I don't see anyway that they are a solution to the political problems that we're having, either individually or collectively?