Those people were ready for the war to end and they believed what the government told them about the conduct of the war. I remember my Dad saying that nobody was gloating over the dropping of the bomb. They knew it was a terrible thing but it had to be done or the further amount of American casualties would have been too high to bear. Therefore the American people accepted the necessity of dropping those bombs. My Dad maintained that people shouldn't try to rewrite history. My parents both said the Japanese were cruel during the war and my Mom admitted she had trouble interacting with Japanese in America after the war. I'm just reporting her feelings as a slice of history, I'm not agreeing or disagreeing with it.
Many American communities were devastated by casualties among their young men.
Read “The Bedford Boys.” It is the story of 19 young men from one Virginia town that died in the first wave at Omaha. Or, the Sullivan’s..five brothers from Iowa who died together on the Juneau..