Now flip it a little. A neighbor calls you while you and your entire family are at dinner and says "Hey, I saw 2 masked men break into your house. I've called the cops but wanted you to know, too". Now, if you leave dinner, drive home, enter your house and shoot the men, how does that play out? Difference being no human was in immediate danger, just your stuff. The first story had human lives at risk inside the home. It is different.