Oppenheimer was right to make the bomb, it was a race to ensure the Nazis didn’t get it first. The atom bomb ushered in a new world order which has so far prevented the extreme deaths and horrors of WWI and WWII by giving saber rattling idiots a reason to avoid out right war. As scary as those weapons are, MAD is a legitimate reason for peace. Children were being indiscriminately killed all over the world as a result of the war for at least 9 years, ending WWII without a US invasion of Japan was a blessing despite the terrible way it was accomplished. I get the “US bad, anything they do is bad” modern filter, but your take is missing quite a bit of nuance here.