Suffice it to say, the right of self defense is not a writ from government. It is a right the inheres in us as men. In fact, it is a right inhering unto every living creature. It is a right that predates the Constitution and the Magna Carta. And no government rightly usurps that right.
My feeling is that it is not only a right, but a responsibility to God to try to protect the life He has given you. I am not a "Bible thumper" but I do have some religious beliefs.