I agree that there is nothing we can do.
You will never stop crazy. The best were can do is defend ourselves and stop them as quickly as possible.
Background checks will do nothing.
Magazine bans will do nothing.
Assault weapon bans will do nothing.
More gun free zones will do nothing.
100% confiscation will create more deaths.
A total of the 2nd amendment will do nothing.
The only things that might help is making ammo and reloading so expensive that people can't afford it anymore.
Kind of like they have done with suppresors and full auto.
They are so expensive that only a select few can afford the time and money.