Back in 1966 I was at the public library in Roswell NM and in a book about the dropping of the bomb someone had scrawled..”TIBBETS! MURDERER!”
Someone else had also written a two page defense of what he did.
My dad, in 1945, had been returned from Europe after the German Surrender to begin training for the invasion of Japan. He told me that when they got news of the first A-bomb on Hiroshima all the soldiers breathed a sigh of relief as they knew the war was almost over.
Interesting note I first found out when in the USAF, after the dropping of the two a-bombs the US continued to pound Japan with conventional bombs up till the surrender was signed.
Operation Meetinghouse - the firebombing of Tokyo - killed more people than were killed at Hiroshima. Curtis LeMay systematically burned down the 65 largest cities in Japan with the lone exception of Kyoto which was placed off limits due to its cultural and historic significance. Hell yes, the bombing campaign went on right til the end.