Modern rapid-fire weapons and gun control

Here’s why I and many others – including, for example, the parents of the Sandy Hook and Columbine school shooting victims – abhor this insane parody of gun ownership as an “expression of freedom”: 
In Dunblane, Scotland, Thomas Hamilton walked into a school and murdered 16 children and their teacher. Not too long after that, a man walked into a school in England intent on homicide with a weapon that wasn’t a firearm. Result: no deaths. 
Those foolish people who waffle on about the US Second Amendment amid their mindless support for the National Rifle Association fail to realise that 18th-century smooth-bore muskets are not 21st-century automatic rapid-fire weapons. People kill people with whatever comes to hand, but it’s a damn sight easier to murder several children at once with a loaded gun than it is with, for example, a knife. 
So, in a so-called post-truth world, we have a level of overkill inconsistent with archaic early-industrial thought.
For the detractors lining up to take a swipe, I’m writing as a person who doesn’t want to see people losing their lives because others cannot, or will not, see sense. This concern includes you.
Dr Frank