One who enters without invite into the dwelling place is not someone that should be tolerated.
They have sacrificed their rights (period).
The right to life is not severable from the other rights.
Therefore, when the person(s) enter uninvited, they have left their own rights, and live under the expectations of the owner of the dwelling which in their case is not in any manner considered friendly.
Should that owner decide, the breathing and functioning body of the intruder may be ceased.
Personally, I don't any longer carry a weapon. I really don't have the need, and I figure that very little I have is worth giving my life to save other than the protection of my loved ones.
However, I will gather as much DNA evidence in hair, skin, blood or whatever other body fluids and parts I can gather that the court system be able to more easily identify the intruder (if they survive and I do not).