The battle of Okinawa can be argued made the Americans want to use nukes. It scarred them so bad they didn't want to fight on main land Japan.

That and the previous fighting from fake surrenders, targeting medics, kamikaze attacks, you can forgive them for thinking using a new weapon like that (as it was more for show, firebombing probably killed more than the nukes) would force the Emperor to surrender as he was the one that needed to give up for the rest to follow. It wasn't just an invasion of homeland, it was a religious virtue to die for the Emperor but if he said stop at any time, they would have stopped. It's the downside of being to reliant on a figurehead for cultural reasons.

The battle of Okinawa can be argued made the Americans want to use nukes. It scarred them so bad they didn't want to fight om main land Japan.

That and the previous fighting from fake surrenders, targeting medics, kamikaze attacks, you can forgive them for thinking using a new weapon like that (as it was more for show, firebombing probably killed more than the nukes) would force the Emperor to surrender as he was the one that needed to give up for the rest to follow. It wasn't just an invasion of homeland, it was a religious virtue to die for the Emperor but if he said stop at any time, they would have stopped. It's the downside of being to reliant on a figurehead for cultural reasons.