No, that is not within the ordinary citizen's purview. You protect and defend yourself and your own. The 2nd Amndt calls others to protect themselves. If they happen to benefit from your own self-protection activity, ok; but if not, too bad. They have their own responsibility, and if choose not to exercise their 2Amdt rights, it's on them, not you.
Point was, considering the statute as written, It would be a viable defense.