I'm assuming you are referring to the school shooting in Florida as the FBI's failure? I don't know anything about a possible conspiracy and haven't heard anything until now.
It's an interesting topic but difficult for me to understand how such an intentional failure on the part of the FBI could push the leftist (progressive) agenda? Unless, through the leftist media, & using the victims' families as pawns, push through a repeal of the 2nd Amendment?
Thanks!