Honestly gun confiscations is the only way that stopping mass killings and school shootings will ever happen but that's not realistic for obvious reasons.
The problem gun control advocates have is that firearms are so entrenched in American culture that you need radical methods to address the issue. Like no-one actually believes that background checks or an assault weapons ban will stop the next school shooter.
ISIS used trucks to kill people, I assume you want to ban trucks to prevent future mass casualty truck attacks as well
I'm tired of this argument being put fourth so I'm finally going to say something--large trucks require a CDL license and a class that you have to pass in order to use one. Assault rifles require no such training, so if you're going to use that senseless argument, then you should at least advocate for the same requirements to own an assault rifle that exist for driving these sorts of vehicles.