Start off with polite inquiry. If it's a false positive, apologize truthfully!
If it's a true positive, you can still rebuke the aggressor politely. "Wow, that's really not cool, man. Don't you owe her an apology? What if somebody did that to your sister or mother?" You don't need to demolish the person because maybe they're not a lost cause and they can learn.
If it's a true positive, you can still rebuke the aggressor politely. "Wow, that's really not cool, man. Don't you owe her an apology? What if somebody did that to your sister or mother?" You don't need to demolish the person because maybe they're not a lost cause and they can learn.