Absolutely, to everything you said.
It's rather a chilling reminder that nuclear power is dangerous, even in hands that you'd otherwise assume were qualified to handle it. Mistakes happen. Carelessness happens. And then entire continents face the consequences.
Not-so-subtle reminder that nobody should be championing war between nuclear-armed nations, ever. Compared to nuclear weapons, the Chernobyl disaster that dumped radioactive fallout all across Europe barely measures as a blip. That should terrify everyone.