I admit--I wasn't very accurate on my original speculation. Allow me to try again.

[Yo_Mama]

35. They obviously planned to carry out additional attacks, but I think this was planned

I don't buy the workplace violence theory at all. There's nothing to it.

I think the meeting was chosen because higher-ups were coming in, so it was a "nice haul" from this sicko's point of view.

This very obviously wasn't planned to be a suicidal attack. The short fire stream and quick exit were probably planned along with the rental, etc, so that they would be free to pick their next target. Apparently this facility was used in police active shooter drills, so he probably had a very good idea of what the timing had to be.

There was a bomb threat earlier at Loma Linda that day. I wonder if these guys were responsible.

I bet these lovelies had a police scanner, and when they realized the police were going to stop the car, they returned home to get a "clean" vehicle, only to be shocked when the police showed up.

Part of the Paris attacks were a sequence that seemed to have been planned to draw the police and military units away from the main attack, which did partially succeed, btw. I think that was their plan here.