I have had to protect myself financially. Can you tell me 1. A. Good questions, and no easy answers for any of them. You may wish to talk to your husband's doctors and therapists if he will allow it. They may have better insight into how he thinks than I can give you in the thumbnail sketch you provided.
People experience reality based on how they see the world.
If your brain chemistry is off, you see it different from other folks. It is all chemistry. On top of this, if there is not any insight by the afflicted individual into the wrongfulness of their actions, there is little change that will occur. You really cannot do much other than to hold your ground. Answer is it depends.