Originally Posted by ottopottomouse

I do think karma exists in the way of if you go round being an arse to people it will come back and bite you later.

Pearl Harbour was during a war and the people responsible and the pilots (a lot of whom wern't volunteers) are dead. Karma can't really come back and bite the dead and Hiroshima/Nagasaki would be the return x100, not a random act of nature to a later generation of people.