WHO COULD HAVE SEEN ALL THESE SHOOTINGS COMING? OH YEA THE FBI - The Liberty Bowl - episode 14

the FBI has been monitoring any and all threats very closely for years how could they have missed all these shootings that all conveniently had manifestos posed online just before it happened? They say themselves on their own website that they closely monitor ALL threats posed online is it possible they just kind of look the other wat when it can further a political agenda?

https://www.fbi.gov/news/stories/hoax-threats-awareness-100518