Why has displeasure been expressed about Barbenheimer fan arts?

First, expressions of displeasure against the Barbenheimer fan arts are not a call for accountability for past actions. At least the Japanese government has never called it a war crime, and I agree that the avoidance of the Honshu landing operation might reduce the deaths of millions of people in both Japan and the United States. (footnote1)(footnote2)

On the other hand, it is recognized as a tragedy common to all humanity due to weapons of mass destruction (WMD), and their use is indeed prohibited.

In some of the battles of the US military since the Cold War, there may have been cases where the use of WMD could have reduced the number of casualties. But the US military didn't take this option because the use of WMD could easily lead to a tragic escalation of the war. The film "Oppenheimer" (2023) depicts the ethical anguish over the atomic bombing (you should see it, of course, because you participated in the campaign to see it).

During the Cold War, the American people also lived in fear of nuclear weapons, and the world shared their feelings. The Day After (1983) was made under such circumstances and is well worth seeing as it shows the fear of nuclear weapons as seen by the Americans. The BBC nuclear bomb script is a good resource to experience the terror of nuclear weapon. If you want to know more about what happened under the explosion, the Barefoot Gen series will be a good choice. It is written by a person who actually experienced the damage of the nuclear explosion in Hiroshima.

To eliminate the tragedy and terror of such weapons, the United States government continues to work for the reduction and non-proliferation of nuclear weapons. I wish that you will share the view of nuclear weapons that the rest of the world shared during the Cold War, and that you will respect the efforts of the world and the United States government to address the tragedy of nuclear weapons. The world still has enough nuclear weapons to incinerate itself.

I do not claim copyright on this document, so feel free to copy or modify it as you see fit.

(footnote 1) According to Paul Poast, the Manhattan Project was actually more about impressing Stalin than destroying Japan. It should be noted that while the number of atomic bombs manufactured was limited, strategic bombing with conventional bombs also caused the same damage as the atomic bombs.

(footnote 2) As far as I know, the theory of U.S. responsibility for the perpetration of the atomic bomb came out of the American left during the Vietnam War era.