And who, pray tell, is going to do it? The FBI? Local LEO's? Politicians? The Media? All who have proven to be abject failures eager to demagogue death for political advantage and/or money?
Another school shooting is on the way and the 2nd Amendment will be among the victims.
Politicians act when: A) they are paid to; B) when they think their careers will end if they don’t.
I didn’t mean to imply it would be easy or even possible. We are basically doomed, because the pressure of B is overwhelmingly coming from the vocal, organized anti-gun mob-rule crowd, amplified by the usual leftist media. 2nd Amendment supporters will do absolutely nothing but whine. As you say, the next school shooting (maybe a few) will be the end of semi-autos, which will open the door to confiscating everything else including liberty of any sort.
Things that would minimize mass shootings:
1) Outlaw violent video games. These don’t affect normal minds, but for nuts, thee are basically murder-spree trainers. Does mindless entertainment outweigh children’s lives?
2) Require enhanced analysis and reporting before psychotropic meds are dispensed, with LEO ramifications.
3) Lock up schizophrenics that display violent tendencies, instead of letting them run loose under the dream that they will keep taking their meds on their own. Major civil liberties problems, but life isn’t fair.
4) Limit purchase and possession of firearms by individuals diagnosed with serious mental problems and/or on certain psych meds. Allow due process appeals to courts.
5) Ban “Diversionary Discipline” and other leftist programs that destroy schools by treating serious crime as a school disciplinary matter instead of a criminal justice matter.
6) Require the military and government agencies to actually send in their data to the NICS Database.
Every one of them violates someone’s rights and has a major downside. But every one of them would do much more to reduce violent crime and murder than more unenforced paper laws against firearms. Therefore there is no chance they will be tried.