Sometimes we need to get tough and dish out tough love. His bad behavior is no one's fault. He clearly needs help and refuses it. We can lead a horse to the water,but we can't make him drink. If this was me I would make it clear that I love him, but I cannot take the abuse. I would then tell him to leave me alone until his behavior changes. If that means him going back to jail then that is what I would do. If your mom put out a protection order on him then you can really tell how scared the both of you are. He's just not safe to be around. If you think he will react in an abusive way telling him to leave then call the police. You shouldn't need to feel guilty for his poor behavior. He knows right from wrong. Besides the fact that neither one of you need to be put threw that. Take Care