No their cities will perish when food and energy is cut, by thkse whom they wish to harm.
To a large degree, you are correct. The cities will go up in flames. The cities will become dystopic nighmares. No energy, no water, and no food.
The denizens therein may attempt by sheer numbers to go out into farm country (on foot) and obtain what they think is their due, only to find highly armed resistance.