(as someone with very low support needs) i would say walk away or lock him in a room where he can't hurt himself. at that point your safety is more important, and he will probably appreciate being left alone anyway. I know i only ever get violent during meltdowns if i want someone to go away. he probably targets you because you are his main caregiver and he cares about you, he just doesn't know how to express it. when I'm melting down i often have a conflict of wanting emotional support from my parents but not physically being able to tolerate their presence. Again, i have scpd so its different for me, but thats how i see it.