Actually I blame the dog owner more, I find it completely ridiculous that so many people take their dogs to the store, mall, hardware stores, whatever. But to take an animal and then leave it in the car? What the hell, leave the dog home, and if you cant be away from it for a short period you have a serious problem. There are too many people claiming that their pets are service animals just so they can take them wherever they go and this ends up causing problems for people with legitimate service animals.
I do, too. The only way my dog would be "left in the car" would be if I was pumping gas, paying at the pump, and standing right next to the car the entire time with my concealed handgun. This guy was a fool, trusting his dog to "the kindness of criminals".
And even if the crooks had "done the right thing", his dog would quite possibly be lost or killed in traffic. Either way the owner was an idiot.