as soon as they showed up, they should have said "Hi" he should have handed over his SDA Card, they should have said thank you and walked way. Drawing a firearm on him and harassing him after they established he was within his Rights, violates the SDA law.
For starters they drew the firearm before they established his credentials to carry, after that they were in no way aggressive or harassing to the man. You sir just seem to want to argue.