I don't have the book title I read years ago off hand (it was from a library, I never had my own copy), but the only valid point in the article is that after the first bomb the talk of surrender became more commonplace among the non military government members, but the military was still refusing to give up. The general populace, of course, believed we'd do what they did to us, and would have fought to the bitter end.

There's a few interesting bits on the kamikaze pilots, who sometimes were guilted into doing it (though some did it because they were batshit crazy).

Ultimately, the first bomb should be considered completely justified, the second I'm willing to have a discussion about with people, but to say neither was justified is frankly retarded and only makes sense if you hate the west and everyone in it (which is the typical leftist position).