That's not what that statute means. It doesn't allow you to use deadly force in defense of property just because there's a third person in the car. It was intended as an anti-carjacking statute to make it clear you could shoot a car thief to prevent -someone under your protection- from being taken along with the car. In essence it made carjacking an occupied vehicle explicitly kidnapping to clearly extend the existing right to defend third parties to that situation.

It's a result of the media-generated carjacking panic of several years ago fueled by a few high-profile incidents and breathless reporting by idiot, headline-seeking "journalists." A bunch of states passed them.