The principle is simple, and based on natural law. You are born into this world, and have a right to defend yourself. The state cannot grant this right. It can make it that much more difficult to defend yourself. There is nothing cowboy about defending your life.

Looking at data in big cities in Germany, US would you, as a woman, feel safe today walking all neighborhoods at any time of day? Remember that guns are an equalizer for more the vulnerable and weaker against those who would cause harm.

As for the a foreign state invasion, it is an incredibly more complex thing to discuss. Would an armed with butter knifes & pretzels, or armed with AKs and RPGs populace be easier to roll over?

The Taliban provide a clue.