My brother came over to apologize for something absolutely horrid he said to me and somehow "You've never done anything for me," profanities, accusations, and a threat of a beating (i'm a 25 year old female and he's 31) got added to "I'm sorry." I seriously felt like calling the police it was that bad.

Should I have just kept my mouth shut and accepted the fake apology even though it was laced with delusion and anger?
no, he came over for a "social visit" to apologize and it turned into a one sided screaming match.