If you can't take his behavior, leave the room and just don't talk to him or listen. Get him to the doctor. If your family doesn't support this, walk away, and just ignore him. go to another room, leave the house. He will get the point if no one listens. He should not drive in his mental state. He doesn't sound stable enough to..just my opinion. If he is like this in public he would be considered to be" not stable." I don't know if his Christian background would help at this point. I really do think his doctor should be involved. I am so sorry you have a difficult family member. I had issues with my mother that were hard to put up with as well, so I do understand. I will keep you in my thoughts and prayers. ginnie