You can't just hit somebody in the face because they are in your house and the terms on the door clearly says that you can.
This may be worth a read: https://en.wikipedia.org/wiki/Castle_doctrine
This may be worth a read: https://en.wikipedia.org/wiki/Castle_doctrine
Your response is especially bad because according to the linked article:
"..as a place in which that person has protections and immunities permitting one, in certain circumstances, to use force..."
Note that is says, "in certain circumstances". Flexie wrote that you can't just hit someone in the face in your house. Flexie is correct in this and the castle doctrine in no way disputes this.
I think this answer missed a (somewhat) negation in the middle of the parent posts' argument