Somehow the entire idea that the government will make everything better is suspect. The FBI agents have adulterous affairs, think nothing of it, and are swayed to abuse their power for a political party or against others. And you want to understand how they could have missed preventing the shooting of so many at a public school in Florida. They were busy, likely.
The idea that the 'we the People' gave up our ability to handle problems is new... it is not historic, rational nor holy. I can affect my life and all those that I interact with, and do take responsibility for my actions. I cannot be responsible for what they think about my actions, thoughts, nor purpose. I must always believe we are all doing the best we can with what we have.
There are agents of evil, ill will, and destruction trying to change everything to the wrong. I don't spend anytime identifying them, but do run into them from time to time, or I see them from afar and avoid any place they would have power over me. I am at Liberty and choose to remain so.
My view on all school shootings, is that everyone needs to be responsible for building better people. Allow, first, adults to carry loaded firearms everywhere. The government was restricted from infringing on their right in the 2nd Amendment of the Constitution. Secondly, enforce the first part of that same amendment - works for the Swiss and Israelis. To be secure in our nation the People must step up and be well regulated as part of the Militia. Train them, arm them use them to defend (free of cost) the schools and libraries.
Yes, there should be many other things needing done, but that was the start.