Character A walks into a bar. Character B has agreed to meet Character A inside the bar. A bar is a place where characters meet to drink alcohol together, due to the social stigma of drinking alone. Character A orders an alcoholic beverage. Character A sits at a table with the drink. Character A is not aware they are part of the set-up for a joke, and even if they were, what would they do about it?
Character B represents a visible minority. Character B is the butt of this joke.
Character A orders Character B a drink, to demonstrate Character A’s charitability towards fellow human beings, by purchasing a drink which will slowly poison their fellow human being from the inside out and lower sometimes useful inhibitions. Character B does not drink, due to their religion, which is funny, I guess, because a bar is a place of drinking. Why invite someone to a place to drink if one does not drink?
This represents the contradictions and hypocrisy of Character B’s belief system, while making Character A look reasonable and even wronged, to a certain extent. Character A does not need a personality because Character A is in the right. Also, there’s a similar joke comparing Character B’s people to poisoned candy.
It’s a pretty funny joke. Maybe I’m not telling it right.