Are they really vastly beyond OUR ability to imagine, or YOUR ability to imagine??
This is a personal issue for me, because I have been to Nagasaki, and I have also been trained in the fine art of Nuking Folks (IF you doubt this I can email you a copy of my certification from Nuclear Weapons Training Group Pacific). I have a finely developed ability and understanding to imagine their scale, as I have been trained to use them.
As an American I spit on your premise. Here's why: The brainwashed, servile, bootlickers allowed their military and central government to overstep the bounds of a civilized nation. The people suffered because they allowed the transgressions. Their fault, as they were to blame for the government they had. I do not even care if we saved our troops lives or not. We had the bigger gun and used it. End of story/war.
I was once in the chain of command for any orders to use nukes on other people.
BTW, you still end up blaming women and children for the actions taken by Tojo and his minions.