If it had not been for the hired security there those two might have made it into the facility.
The FBI agents did nothing to stop them even when they were just at the entrance to the parking lot of the facility.
Looks A LOT like they were just going to let it happen.
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Let it happen or were part of it. Local law enforcement drew guns on the FBI and only then did they reveal who they were.
Supplying the weapons to let the Muslim/mass shooter/school shooter do their thing seems to be the M.O.