I have also found that I'm not effective communicating with belligerence, or drunk / dry drunk people in general, so I do my best to take myself out of the situation or use situational awareness to not place myself in those types of situations.
My boundaries are that I do not allow alcohol or drugs in my home and I do not socialise with people who drink/ use; when I'm in public and someone is drunk, I leave. I'm highly sensitive to situations where there is domestic violence having lived through it and chosen to leave that life behind, so I don't tolerate it at all.
I know it is different if you live with someone who drinks / uses. I would strongly urge you to look at safety. Behaviors with alcoholics progress, just like the disease itself does, and it's a slippery slope from belligerence to outright abuse.