Without having more personal details about your husband, I can’t determine with certainty which, if any, disorder that he may have. It is possible that he may have a personality disorder but again, I would need more details to know that with certainty.
Even if you were to determine the specific type of disorder that he may have, it does not change the fact that he refuses to seek help. The reality is this: he is very difficult to interact with and he refuses to accept treatment. He has also threatened your safety. This leaves you with a very limited set of options.
The marriage may be salvageable if he were open to treatment but short of that, it would be unwise to return to the relationship, especially in light of the potential for violence. Most relationship problems are solvable but a full commitment to repair the relationship is required of both parties.
It is important that you try everything you can to mend this relationship but realize there is only so much you can do. You cannot force someone to participate in treatment.
If he is unwilling to participate in treatment then you have two basic options: continue the relationship, despite his personality and behavioral problems and the potential for violence, or end the relationship.
In a scenario in which he refuses treatment and your safety is at risk, I would recommend ending the relationship.
Don’t risk your safety. Consider individual therapy to help assist you in determining how to proceed. Please take care.