Here's what really gets me: the NRA and right wing media have relentlessly played up the image of the strong American homeowner defending life, family, and property against the forces of evil that are lurking just outside. They are directly feeding into the mentality that you need to shoot first at whatever comes through the door and worry about who it is later, when you know for certain that you're safe. And that is EXACTLY what this guy did.
If you're not always armed and always ready to fire at moment's notice, you're a victim waiting to happen. Unfortunately for this guy, the person he happened to exercise his constitutional rights against was a cop.