Earlier quoted context omitted.
No actually. Thats not what the castle doctine does. It does not allow you to just shoot someone, who is standing outside your door. If they broke into your house, then yes it might apply. But it absolutely does not allow you to just shoot someone, who knocked on your door.
This has happened - of course, this is Florida, but still: https://slate.com/news-and-politics/2012/03/why-george-zimme... This guy wasn't even on his porch. Stand your ground laws essentially allow gun owners to claim they were frightened for their lives so that becomes "their castle". Wouldn't be very hard to repurpose this kind of weaponized law to actually defend your household. btw - castle doctrine was intended…
According to the zimmerman trial, if you look into it at all, Zimmerman claimed that he was being attacked, got knocked over on the ground, and then while the attacker was on top of him, yelling that he was going to kill him, he defended himself with a gun, at that point.
And there was some physical evidence and injuries supporting this narrative.
You can say that his statement is a lie, or that you don't believe his testimony.
But, if that testimony is true, Shooting someone who is on top of you, assaulting you, yelling that you are going to die, while you are on the ground, is a much different situation than shooting someone who just knocked on your door.
I would really recommend you look up that case more, if you thought it was in any way similar to "just shooting someone, at your door".