Something else is that a majority of legal gun owners are black men and women who want to protect themselves.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed." - Admendment II of the U.S. Constitution. The purpose of the 2nd Admendment was to make a milita to ensure the U.S.A. didn't become an oppressive government. (Hence "free State"). Despite what Joe Biden has to say on the topic you COULD buy a cannon. And the musket arguement is a poor arguement considering the United States government used muskets at the time and that when new technology was made (i.e revolvers, lever action rifles, etc.) the idea of people owning those was protected by the 2nd admendment.
Incorrect. The purpose of the 2nd amendment was to make sure that citizens were armed in the event that the British had other ideas for this newly created country. People love to pretend now that it's to stop an oppressive government, which is laughable, because if the government decided to act in an oppressive matter, with the support of the military, there is almost nothing that civilians with handguns and AR-15's could do about it. You'd be droned out of existence faster than you could even create a plan to fight back.
The musket argument is perfectly valid. It was representative of the type of weapon that was available at the time and so concerns about mass shootings unrelated to war didn't really exist. Things are different now, and when things change, you change also. We have failed to do that, again, because people prioritize their guns over the health and safety of others.