@InfraBlue,
It goes back to the foundation of the US as a Republic of states under a restricted Federal government. The Constitution was a list of what powers the Federal government could and couldn't have. The ability to infringe on the people's right to keep and bear arms was a very clear restriction that has been bastardized through the years. The reason for that was the citizens of the US, as Madison points out, are the best-armed society in the world and the government is of the people, by the people, and for the people.
Now, the government is of the wealthy, by the wealthy, and for the wealthy. The rest of us are basically wage slaves and tax monkeys.