Nothing works better in court than an inch thick file of court orders against him.
File for a protection order.
Call the police when he comes home in a rage.
Go to the police station, and just talk to an officer about options. Mention his name.
Have him commited. Some states allow you to have someone taken in for evaluation. They stay anywhere from 24 hours to 48 hours. If he poses a danger to himself, they'll keep him longer.
As for community property, in SC, what ever you owned before your marrige is still yours. What ever you gained together, including debt is divided.
Then again, if you can get him to agree in mediation then maybe you won't lose anything. You must speak to an atty in your state.
I am sorry you have to go through such terror. That's what I hate about drugs and alchohol. You live as a victim.
You don't have to keep living as a victim though.
When the time is right, you'll make the decisions you need to make.
I hope it gets better for you.