Why two bombs?
Why not one with the threat of "the next one is on the way" if you dont surrender."

There's a crime against one whole city of innocent people right there.

Pay backs a bitch, Sink our ships in Hawaii /we flatten your assess once and for all.

To be fair though : Nagasaki got unlucky,
they wernt an original target the real target was cloud covered and the delivery men took it into their own hands to drop on a town they could see on the way out.