Nihilists! F*** me. I mean, say what you like about the tenets of National Socialism, Dude, at least it's an ethos.
Setting reductio ad absurdum aside, there's a divide between things that are worth worrying about and things that aren't. Where you draw that line depends on loads of factors. In this case, I would reason:
* There's nothing we can do about it
* It has no practical impact of any concern
* It's exceedingly unlikely we will ever be able to produce a reliable answer to the question "why"
At that point I'd say "stop worrying and love the bomb."
And that concludes movie classics class for today, kids!