He may, or may not be an *******. Alcoholism and assholeness are not necessarily related. You can be one, the other, or both.
My alcoholic step-father is the sweetest guy you ever want to meet when he's drunk or sober. My wife? Angry and stubborn sober, angrier and more stubborn drunk. Me, ******* sober, and nice when I've had a couple. I believe this is true of everybody, and I believe being drunk is a poor excuse for being an *******.
But, to your situation as you described it, from what you posted the first thing I thought is, "why do you care so much about this?" Why does it matter in this situation?"
Just like when wife and I moronically argue about the right way to load the dishwasher, this falls squarely, in my opinion, into the let it go bucket. Perhaps, like me, you have an addiction to drama?
Just a thought. Take what you want and leave the rest.
Cyranoak