[TigerLikesRooster]

Actually that is what I am thinking too. Their atomic bomb does not have to be accurate. If it goes off some vicinity of a big city, the resulting fallout would impact many people with life-threatening health problems. Besides, who wants to live in a city near fallout zone? Technically, it may be safe after several months, but people won't be near it for at least a decade. The whole city would become a ghost town. That is a serious widespread economic damage from which it is difficult to recover in a short time.

[mrsmith]

Much worse damage. A quarter of the US.
The (merely) 15 kiloton Castle Bravo test in 1954:

“The blast cloud contaminated more than 7,000 square miles (18,000 km2) of the surrounding Pacific Ocean including some of the then inhabited surrounding islands including Rongerik Atoll, Rongelap Atoll (120 kilometres (75 mi) away) and Utirik Atoll.[9]”
https://en.wikipedia.org/wiki/Rongelap_Atoll