Because local news love to omit certain details of a case or don't know them to begin with.

They make money reporting what people want to read and that's not necessary what's true.

Examples? Maybe it’s true but I’d be surprised. Like I said from experience of living under a number of jurisdictions, none will charge a person with murder in those circumstances. Everywhere I’ve lived, if your life is directly threatened like that, you are absolutely allowed to defend yourself with violence commensurate with the threat.

They may have been confusing or deliberately conflating things with the fact that in most western jurisdictions, you are not allowed to kill, for example, a fleeing trespasser or burglar. This is viewed as an entirely different situation from one where you are being threatened directly with immediate physical violence.