^Don't a lot of the people who believe the right to bear arms is essential to deter such an invasion, or tyranny of the US government, also believe that they are effectively already undergoing a Mexican invasion, and are already victims of a tyrannical government, and also own lots of guns, that they do fuck-all to solve these problems with, and just use them to shoot their family members more often than criminals? Forgive me if I've not understood the broad contours of certain parts of the political landscape in the states.
I have a confession- I'm unamerican. I am from the UK, live there now. I'm not allowed a handgun. That's OK. I don't need a handgun. The police don't need handguns, either. We get by just fine, and the funny thing is, I am at a hugely lesser risk of being hauled away by paramilitary police to be incarcerated in a privately-run for-profit prison than is a citizen of the United States. It's funny how the land of the free deprives more of its citizens of their liberty than any other nation on the entire planet (Russia, Niger, Iran, Chad...). See, I live in a country where people are openly socialists, and atheists, and think that the way to make schools safer is to have no guns in them, not more. Yet paradoxically, I seem to be more free in many ways. I'm an atheist, and I have Muslim and Jewish and Christian friends, and we are all free to hold those beliefs (free not just from legal sanctions, but social stigma, too). If I was gay, I could enter a legal partnership with the person I wanted to share my life with, like anyone else. If my girlfriend gets pregnant, she can have an abortion. Does the second amendment protect women from the tyranny of men over that deprives them of agency over their own bodies? Does it protect innocent New Mexicans from the tyranny of repeated warrantless body cavity searches? Can anyone actually give a single example of all the guns protecting anyone from governmental oppression? Did Koresh or McVeigh win?
The guns poison not only your nation, but your entire hemisphere, causing the Caribbean and Central American nations to have the highest murder rates in the world (largely because of the huge amounts of money to be made in the international drug trade that is in the hands of criminals because the government of the United States has deprived its people of yet another freedom).You can make your principled arguments, but do you not see the irony of passionately following ideological dogma that flies in the face of pragmatism and experience, whilst holding up pictures of Hitler and Mao and Stalin as examples of how government should not be? Here in the Old World, we do this thing where we change our ideas and our priorities and our laws over time, rather than blindly upholding documents written by people who clearly could not have foreseen what would be politically and socially prudent hundreds of years in the future. We call it "progress". You could look into it.