Lucidity.....hugs and love to you for what you are going through. My 23 year old brother is schizoaffective and acts the same way towards my mom. He is verbally abusive and hateful towards her (but he's never threatened her). I don't know your whole story, so I can't speculate too much, but I can ask you not to give up on him. If he's threatening to harm you, or himself, you can have him taken to your local emergency room for a psych eval (like Angelique said). It probably won't be a pleasant situation, but that might be what he needs. Believe me, I know it's easier said than done, but try to remember that his actions aren't completely him...he's responding to whatever he's experiencing in his mind.