It’s like driving on a bus with a terrorist who insists “you have to do what I want!! Or I’ll blow up the bus!”, but they’re on the bus with their whole family who might not want to do that. Putin himself might be wacked out enough that he decides to. However, it’s been obvious for decades that the doctrine of Mutually Assured Destruction is accurate, and most nuclear countries seek to maintain that as a deterrent. I don’t think the rest of the power structure in Russia would allow that to happen since it’s obvious suicide. Even if they weren’t instantly nuked by the US, France and UK, it would fuck up so many things in the world, including for Russia, that nobody would win that. I don’t think Putin wants to destroy all of civilization… he just wants Russia to regain power and be on par with the US, EU and China.