Yup, this is what addiction does, turns some people into hate spewing, hateful, self absorbed, a-holes. Not sure what your friend is on, but chances are, even if you were kind and compassionate, that could have been taken and used against you in some way too.. You could have been cut off no matter how you reacted. Your friend sounds like he’s active in his addiction and just wants to isolate, and isn’t even thinking about loved ones carrying the burden of worry, because he’s so self absorbed right now, he probably doesn’t give a s**t about anyone but himself and his substances of choice. Maybe he’s so sick in his alcohol/ substance abuse induced craziness that he’s also getting off on hurting others right now. Scary what substance abuse can do to people. It’s terrifying.
Not sure if you’re going to come back and read any of the responses, but I’m sorry you’re going through this. Best wishes to you.