Here's the MOTIVE: FALSE FLAG organized and carried out by the Deep State FBI to advance GUN GRAB laws and rally the American people against guns. There's your motive.
San Bernardino, Las Vegas, Parkland, and others.
Hate to say it, but I agree. The FBI had two reports on the Florida school shooter saying he was going to shoot up a school and they did nothing about it. Allowing it is a form of participation.
This morning I read that the Pulse Nightclub shooter was the son of an FBI informant.