if he is doing these things sober, or not as drunk, than he is an ass.
even when i was drinking, and very very drunk, i would never lash out at those around me. never. i think anyone who does has other mental problems, that are perhaps just escalated by alcohol.
im not someone to give advice, really. but if all these things are the case, get the he** away from him. keep adult family close by, be safe, dont trust for a second to be alone with an abuser like this.
please get away from it before you start to believe the crazy things he is saying. drunk or not does not matter. if someone is holding a knife and saying "im gonna stab you", i really dont care what his story is, drunk, on drugs, or just crazy. im getting away from the dude with the knife