This article finally explained what was going on with my former friend. He was extremely narcissist (and an alcoholic), then got rejected by a woman and started lashing out at all his friends because his image of being a self-proclaimed "dominant alpha male" was shattered. I told him to get therapy then he shifted his attacks towards me instead of her.

I no longer associate with people who have drinking as a core hobby, it just exacerbates whatever emotional issues they may already have.