Theft is always the thief's fault; you don't get to lay blame for their bad acts at the feet of the victim. And "reasonable" actions to protect themselves, starts to sound like those "reasonable" gun laws.... you know the ones that aren't a damn bit reasonable?
No thanks, they can run their business as they please; you disapprove? Shop somewhere else.
Now, as to those 2 gun shops you referred to, do you know if the one with no visible security leaves their merchandise on display overnight? Because what I have seen a few shops do, is spend their security budgets on a couple large gun safes bolted to the floor in the back room, and a serious alarm and camera set-up. And every night at closing, they move all the merchandise back in there. Safes can be broken into easier than most folks think, (see link in earlier post) but they won't have time during a smash-and-grab burglary.