With this logic, you should condemn democracy because a democratic country bombed and killed over two hundred thousand human beings were killed with two bombs. That would probably include pregnant ladies too. The day you condemn democracy using the same standard you had set, you will not be a hypocrite using your own title of this thread.
Japan merged with Hitler's Nazis. They sneak attacked during peace negiotiations, destroying much of the Pacific fleet bottlenecked in a Pearl Harbor. Kamekazis proved that they were a different kind of enemy, one that used propaganda to brainwash their soldiers into never surrendering for fear of torture. Japanese considered it a disgrace to not die for the war effort, and their entire family would be shamed for eternity at the cowardice. Prisoners in Japan were routinely tortured. Healthy young men, who had been thoroughly vetted by doctors were now dying in droves of malaria or pneumonia (having slogged through swamps in the Baaton march, etc). Toward the end of the war, the
Japanese refused to feed their prisoners, since food was scarce and they had needs for their own troops. The war had to be ended soon
to save the prisoners, and this was the
justification for using the atomic bombs.
My mom was under a lifetime oath of silence, having worked in the Prisoner of War department of the War Department, headquarters, Washington, D.C. It was the precursor of the Central Intelligence Agency, and many CIA agents came from this department. Later, my mom's role was to communicate with the French underground, because she could speak 7 languages fluently, including French. Even after the war, and for the rest of her life, she could not discuss prisoner's fate. She knew that many lies were told. POWs captured by the US almost invariably claimed to be Shinto priests, seeking favored treatment. Gifts (such as salamis) were routinely stolen, because the terms of the Geneva Convention were not followed.
The decision to build the atomic bomb was by necessity. Nazi Germany had already perfected theirs, but the plans were destroyed in allied bombings. Disdained as Jewish science, atomic research had proceeded in Nazi Germany anyway.
My dad was an atomic veteran, arriving 5 days after the USS Wichita (first US ship in Nagasaki), after rain doused nuclear dust. He was one of 44 who went ahead of the radiation team, without radiation protective garments or training, to make sure that the radiation team was safe from snipers. Then he was one of the first to step foot in ground zero of Hiroshima, as well. Most of the Wichita crew had died of radiation poisoning of the 45 crew members who went ashore. None received medals posthumously.
MacArthur arranged to have 10,000 POWs moved to Nagasaki for pick up by the Witchita and my dad's ship. They moved them to Australia, at first (a grateful son thanked us for saving his dad).
Though God tells us not to kill, many find that the US was justified in opposing Hitler and dropping the atomic bombs on Japan.