Can you explain how you think defense courses and learning how to operate firearms would keep people from using them to murder people?
I do think everyone should learn how to safely use a firearm if they are going to own one, but I really have no idea how that would prevent tragedies like this.
NY has a mag restriction, didn't stop the Buffalo shooter from modifying his. Also, it takes a second to drop a mag and reload another so again not sure how restricting to 10 would prevent mass killings.
So then you meant semi-automatic weapons in general then when you said "type" of gun?