You think there's a game theory scenario in the book where France launches a nuclear weapon at mainland USA over a land dispute between them and Denmark?
France has the only first strike nuclear doctrine in the world, with the specific policy of shooting nukes to "protect it's vital interests", a term Macron has recently clarified "has a European dimension".
Make of that what you will, but if I were you I wouldn't go around poking the hornets nest that has an explicit sign "these hornets will sting" attached to it.
See, this is what is so dumb about this: you are treating this as if it is some kind of board game. It is exactly why the US gets into these messes over and over again, the incredible overconfidence that because they somehow have battlefield superiority they can do whatever they want. You are exemplifying precisely where the rot in the USA is located.