I suspect those two kids have been essentially raised by the state. They've been doped and praised for being antisocial and taken to PRIDE groups by the STATE. I imagine the school was aware of them, and all the counselors, and law enforcement as well.
Yet they were allowed to come into the school and gun down kids. Because nobody will take care of their own kids, because the state turns our kids into monsters, and because we refuse to recognize the fact that some crazy people really are dangerous and really should be locked up BEFORE they kill off their classmates. And crazy people absolutely should NEVER be in our public schools. As long as we keep pretending that crazy kids are no threat, and if we just give them enough love and immerse them with sane kids enough, they'll *become* sane, we will continue to have school shootings.