I am sorry. It’s painful to be in the middle of this.

My husband’s family often has similar kind of dramas and as much as he tries to keep his distance and to stay out of it, it effects his stress level. All this could effect your mental health and you need to protect yourself. I’d stay out if it and let them deal with it.

Your friend and your brother and the whole party were drunk AND high, unfortunately it’s always a recipe for disaster. For your brother to hold grudges over what someone said intoxicated is unrealistic as he himself was intoxicated and might not recall things correctly.

I don’t drink at all but in my young years I was drunk twice, both times I made a complete and total fool out of myself so as expected your friend and probably your brother made fools of themselves. Plus maybe there is more to the story. You aren’t your brother’s keeper. If my friend deliberately insulted my brother I’d always choose my brother. Family comes first for me. But there is no deliberate insult. And you weren’t there so who knows what happened.

Let them deal with it and stay out of it. You didn’t cause it and you can’t fix it