Right now I am writing a story within its own realm, sort of like Strangereal from Ace Combat, but with a total of 9 continents and 136 nations with technology and societal trends comparable to what we will achieve in 2040, nuclear weapons are exceedingly rare and difficult to produce and maintain due to a decreased amount of isotopes worldwide. An event similar to the Red Scare has happened a few generations prior, though that was because the internet was basis for communist propaganda and lead to several nations becoming socialist. The general public does not know the total number of nukes globally and know very little about nukes themselves other than they can kill off a big chunk of a city. But the perpetrator was a parliamentary country using it on a communist enemy. There is a United Nations analog but has the influence of the Legue of Nations in the real world. The primary reaction in question is from a nation simular to the United States but with a military and size of western Eorope as well as having a more libertarian government.
closed as primarily opinion-based by Mołot, James♦, sphennings, Aify, Mormacil May 10 '17 at 21:26
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It all depends how heavily the government structure is. If you're talking about something like the U.S. then they would be appalled. If it's like the totalitarian government from George Orwell's Nineteen Eighty-four, then the government would brainwash its population into believing it was them. They would change the news stories to say they warned the surrounding populations before then.