« they're definitely afraid of other people's nukes » – They know 100 % no nukes work at all and never have anywhere.
« USA is afraid of other people's nukes » – And of extraterrestrians, too. It's all just propaganda playing back in people's minds.
« conspiracy theorist? » – The book I referenced has lots of hard empirical facts, notably the medical details, which the author is professionally qualified to assess.
« film footage » – Huge quantities of explosives, WWII production kept going. As for Japan, their gov had to collaborate somehow, and eventually resigned themselves to do so because the US wouldn't accept their capitulation and instead kept democratically napalming women and children.