That is just deplorable.
Regardless of anti-gun organizations being behind this, it seems like a money-grubbing thing as well for the insurance companies. I would like to make the argument that liability would/should be higher if there is no one capable of defending the establishment from a Luby's Cafeteria style assault. Imagine the insurance that would need to be paid out if something like that went down. Of course, I have a feeling that insurance companies would find a way of avoiding payment or at least paying out "too much" to fix a place back up and to cover injuries and death sustained by victims including emotional problems.