I don’t have a problem with anyone killing another person if that other person has broken into their home. In my mind there are a few ways to go, you can go to where they are flip on the laser and take a split second before you kill them if they need to be killed and then pull the trigger. If there are more than one the second one may run or return fire so hopefully after killing the first one and the return fire from the second you have time to relocate then kill the second one. The other option would be to announce you are locked and loaded and any movement to your location means death and the police are coming. Then hunker down and wait. I guess the main thing would be to do what is the safest thing for you and your family as life is more important than property. The other aspect I would think is the main cause around where you live for someone entering your property. Where I live if someone entered it would most likely be someone looking for drugs, alcohol or money and the person would likely be a kid. The trouble is you only get a split second to figure that out before you kill them.
That’s the part of the training that is past the actual operation and handling of the firearm. Assessing the whole situation and then following thru on the plan without accidently harming someone else that’s home.