The U.S. doesn’t suffer from a higher incidence of mental illness than other countries. What we do have is nearly half the privately-owned guns in the world, despite having just 4 percent of the world’s population. You have to be willfully ignorant to deny this as a big part of the explanation for why America has a dramatically higher number of gun deaths and incidents.
[Many] mass shooters have been on dangerous psychotropic or anti anxiety drugs. It’s the pink elephant in the that doesn’t get TV coverage since Big Pharma practically owns the networks. Even on the drug labels they have black box warnings of homicidal tendencies. Stop prescribing mind altering dope to children.
Require liability insurance on all guns. Why do you think people have to be 25 to rent a car? This might even help to justify how much one pays for insurance; similar to how you pay for car insurance, based on your record and driving safety.