For the love of... You people seem to be under the impression that this is some kind of cheap-payback against the West for their defeat in WW2, some sort of self-aggrandizing story where 'glorious nippon' saves the day. Having actually seen the show (which I guess most of you haven't) I can tell you that it isn't like that in the slightest. So it involves radiation killing the Earth, big deal. I won't deny that the dropping of the bombs had a significant impact on Japan, that kind of thing tends to leave deep scars in the social psyche. That doesn't mean the show was made in response to it. You're also ignoring the fact that this was made in the middle of the cold war, when EVERYONE was paranoid about nukes and radiation.
If it has any political subtext at all, it's a generic 'radiation is bad' message made in regards to the looming threat of nuclear annihilation of the era.