There is no time for an internal philosophical debate in such situations.
An armed intruder has broken into your home. In your hands is a fully loaded, pump-action, 12 gauge scatter-gun; with the safety off.
What will you do?
I know what I will do.
A home invader is not there for any other purpose than bad. The fact that you are home and he breaks in anyway means he intends to harm you to get what he wants.
The law saws that in your own home, you are not required to retreat any further before applying lethal force.
I really don't see a problem with baggage in such a situation because there is nothing to feel guilty over.
The body on the floor, approaching room temperature, is the guilty party.