When their opinions are... very extreme.

Earlier today, someone told me that they'd wish someone were no longer living if they mentioned liking a certain type of pizza. It definitely wasn't said in a joking tone either (not that I'd really want to be around someone who made that type of "joke" in the first place) - that was a pretty obvious indicator that they were a bad person in my book.

It was done under the guise of "I don't like to sugarcoat things" 🙄