Those facts have been piling up at an alarming rate lately yet people keep choosing to ignore them and double down on what has proven to be ineffective instead.
Those facts are, criminals, by definition, do not obey the law.
Ditto for crazy people.
If you are serious about shutting down these mass shootings the answer to your problem is staring you in the face.
Make Open Carry legal, everywhere. Make Concealed Carry legal, everywhere.
It’s like the man said many years ago,
“An armed society is a polite society. Manners are good when one may have to back up his acts with his life.”
Outlaws and crazy people alike will stop and think twice about cutting loose with gunfire anywhere if the odds of someone having the capability to shoot back reaches 75% to 80%.
Otherwise it is premeditated suicide and no gun laws would be effective anyway.
Just like they are now.