As a lifelong coward, I would quickly leave the building.
I would call the cops, but I would realize that by the time they arrived, my store will have been completely looted.
Besides, if they did arrive, they would not arrest any of the looters. They would just (gently) ask them to leave.
And if the looters were arrested, they would be out on the street within a few hours -- thanks to having their bail paid by Hollywood "celebrities."
With Mr. Biden's likely election, this situation will only get worse.
To think of what's happening to the United States is heartbreaking.
But, then, all nations have eventually fallen. We ain't exceptional!