If you want to solve most of the problems in America you need to get rid of all of the Democrats.There are already enough "gun laws" on the books to prevent these thing from happening.
But they're not enforced.
So, given the unwillingness to expend the effort that would require let's go against the other common factor: Schools.
Shut 'em down.
Ban them entirely.
Then common sense might make a comeback when the liberal indoctrination ends!
They're the cause of these problems.
This idiot wouldn't have even gotten inside the school if it weren't for Democrat preventing security measures from being used in our schools.