Arzel's explanation, as I understand it, is that this isn't a controversy, it's an episode of leftists overreacting.  That's a fine opinion to hold. But that doesn't mean that this situation isn't a notable incident in her career, as countless reliable sources have covered this extensively.  Kelly has defended herself from the criticism, and Bill O'Reilly and others have also chimed in on her behalf, so that does need to be covered for NPOV concerns.  But ignoring the incident entirely and leaving it out of the encyclopedia isn't the way to go about this.