Let’s say you and I are arguing online. You threaten to kill me. I am not saying you would actually do this, but for the sake of this example, I’m using you and me as an example. I being a leftist whiner rush to my local police and file a report that you threatened to kill me.
My local cops would tell me to stop wasting their time. A threat like that is made ten thousand times a day. It’s made in traffic as some idiot cuts off another idiot who is short tempered. The threat alone, must be coupled with the ability. In my scenario above, we are separated by a thousand miles of distance and a certain anonymity. You don’t know where I live, and it is unlikely that you would travel a thousand miles to start searching for me.
If I end up dead on the other hand, and they have no idea who did it, they may look online and see my history, and your history, and start to wonder if you did travel to the local area.
So the threat, must be coupled with the capability. You or I have to be able to carry out the threat. Merely shouting “I should kill you you son of a *****” at a car that cuts you off isn’t proof of intent. It is most likely a short tempered idiot blowing off steam.
To this case. The Woman inside her home should have called the police. She had time. Dial 911 and watch the door. If the other woman starts to break in, actually damaging the door and making entry probable, then you have a completely different situation.
You have the threat, recorded on the 911 call of the woman outside shouting that you were going to die. You have the door being broken, at least to the point where the entry of the woman is probable. Then you have self defense covered for the courts. Your actions were literally the last resort to protect yourself. Shooting through the door, that’s a lot harder to justify.