I wouldn't be proud of having so many guns and the highest rate of gun deaths by far in the developed world (except maybe countries currently at war).
"Guns are amazing"? Really? Nevermind, I know someone just like you. He refuses to fly on an airplane because he can't bring his precious guns with him on the plane. So he's really never been anywhere outside of the midwest. He has no idea how other countries are. And I've never felt safer than when I lived in Europe for several months, away from all the gun maniacs.
The combination of rampant mental illness and entitled assholes and guns in America is a toxic combination. School shootings and mass shootings are things that happen all too frequently in the US, and not too much anywhere else.
But I suppose you'll handwave away all of it, and everything, so you can continue to cherish your "Amazing guns" without ever considering that maybe even more guns is not better for us as a country.
That said, I do NOT endorse this ridiculous 3D printer bill that California is trying to pass. And not because it's about guns, but because it isn't necessary.
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You may be surprised, but there are countries in Europe where gun ownership is relatively wide spread and it just works. Czech Republic for example has it access to guns guaranteed in Charter of Fundamental Rights and Freedoms[1].
One of the reasons why it works, is that there are reasonable conditions. For example, regular health checks, strict registration, passing gun safety examination and, last but not least, not being a criminal. And it works. Despite steadily rising number of guns among people, it is one of most safe countries in the world.
Canada, Finland, Austria and many other countries, prove, that you don't have to impose blanket bans to have a safe country. You just need sensible laws.
[1] https://en.wikipedia.org/wiki/Gun_law_in_the_Czech_Republic