Something I think people are forgetting is that from a long historical perspective democracy is an experimental governing model. The US, Canada, Australia and New Zealand are the most similar of the former European colonies.The level of control over the citizens' ability to defend themselves varies, but as far as I know the nations with the Queen on the money have more control than the US. You're the control group.
In the US pitri dish the occupants are allowed firearms, lockblade knives, silencers and fully-automatic rifles if we're willing to pay the fee, V8 engines everywhere (for no additional licensing cost) and cheesecake in fast food restaurants.
So I suggest y'all shove off, leave us to our experimental status getting fat, guzzling gasoline and shooting stuff, and quit judging. Perhaps in another hundred years the experiment have run it's course, with statistically relevant results one way or another.