> meanwhile the violent crime rates have not dropped.

The rate of school shootings has dropped from one (before the implementation of recommendations from the Cullen report) to zero (subsequently). Zero in 29 years - success by any measure.

If you choose to look at _other_ types of violent crime, why would banning handguns have any effect?

> Where do we draw the line on which tools are responsible for that instead of the humans using them for it?

You can ban tools which enable bad outcomes without sufficient upside, while also holding the people who use them to account.