After reviewing the tape, I am going to side with the security guards on this one.
1. You have uncooperative driver.
2. Security did not beat down the driver and wife, they subdued them.
3. If driver made it back to his truck, he poses a much greater threat.
4. Driver and his wife should be thankful that security showed as much restraint as they did.
We have gone to many secured facilities including ones with armed personnel on the roof, armed escorts in the truck with their weapon pointed my direction, and extensive 6+ hours searching the truck. In 11+ years I only refused to load at a location because they were demanding much greater services then they were paying for and wanted us to sign a contract with penalties imposed if any of the conditions were not met. Otherwise; their house, their rules.
Opinions matter and I understand the counter arguments. If I was sitting on the jury on this case, I would not side with the driver.