The veneer of civilization is extremely thin. An EMP would do all that you have described, but that would only be the beginning of the damage. The police and National Guard could not hope to contain the rioting and lawlessness that would result when the food and fuel run out. It would make zombie apocalypse movies look tame in comparison. Starvation, disease, exposure to the elements, and extreme violence would wipe out nearly everyone.
You hit our societal crisis on the head!
The riots and serious looting by the gimmes would devastate America as the ‘authorities’ would stand dumbly by watching and video taping the carnage.
America’s large problem is that we have a huge underclass of population who have never heard of the Ten Commandments and are, therefore, incapable of proper behavior. They are simply welfare whores and crooks!