No grey area here. Get a lawyer, divorce & restraining order. You & your family are obviously in danger. If he will openly discuss these things with someone then he is obviously serious. Is he still in the hospital? If so then that is great, he is in the right place & will probably be there for a while after telling them this, if they don't send him somewhere else. He is very ill & a danger to those around him & possibly himself. I know this sounds harsh, but holy smokes! My wife & I have had some discussions about this kind of thing. She has a cousin who is a BP. Her cousin snapped one time & ended up stabbing her husband, big surprise he divorced her. My wife thinks he was wrong to leave her because of her illness! I told her that I was sorry & love her to no end, but if I was in that situation I would do the same thing.
This is no time for wishy-washyness. You have a very serious & potentially dangerous for you & your kids that needs to be fixed immediatly. God bless you & good luck.
No matter what you decide, know that my thoughts and prayers are with you. As i am sure that all who read this thread are keeping you in their thoguhts and prayers also. In the end you will have to make some hard, serious decisions. There are no perfect answers here, but you have to look out for your children and yourself first. I hope he is all talk, and that the stress of this desease is just causing him to act out. I hope he finds the inner peace to either move on or at least come to some kind of truce with his demons.
Good luck. Bill