People that mishandle guns like that should be banned from ever owning a firearm again. And we still have people that argue that one should be allowed to carry a firearm into bars. LOL
Anybody displaying firearms in a place of business for any reason other than dealing with a life or death situation should go straight to jail. Your firearm should remain holstered or packed away at all times.
There is no evidence he was displaying it.
DISPLAYING a gun, is not a reason to go to jail.
You are very willing to send innocent people to jail for simply having a different belief system than you.