Can Netanyahu explain why Japan surrendered in WWII?

In his Meet the Press interview...

...Netanyahu explained that Iran is, unlike the old Soviet Union, not deterable because of Iran's level of fanaticism. "They have suicide bombers"

Okay. Why did Japan surrender in World War II? Japan had suicide bombers aplenty. It was a fanatical operation all around.

So why did the prospect of the nuclear destruction of more cities (beyond Hiroshima and Nagasaki) cause Japan to surrender, unconditionally.

The atomic bomb had no deterrent effect in July 1945 because nobody in Japan knew it existed. And had we announced it, it would not have been believed.

But as soon as Japan was aware of the nature of the retaliatory threat she surrendered.

I find it very unlikely that any state would nuke a heavily nuclear-armed rival when the knowable result would be the utter destruction of the attacking nation. The USSR and USA could not have been utterly annihilated because both are so large and not entirely urbanized. Iran, however, is somewhat smaller and very urbanized.

An individual might do something like that. A individual running state would not. India and Pakistan have failed to nuke each other, and their enmity is not joke. North Korea is the ultimate autocracy and could very easily nuke Seoul, but hasn't. Apartheid South Africa went to black control without ever using the nukes they were always said to have. (Did they? Come to think of it, I never heard anything about that.) The Soviet Union went down without launching anything, though it was tense for a while.

There are many reasons to disfavor a nuclear Iran, but the idea that they would just commit suicide as soon as they had a bomb (which attacking Israel would be) is not obvious.

Oddly enough, the greatest threat of an Iranian bomb to Israel might be that it would greatly increase Israel's chances of being nuked by Saudi Arabia someday. (SA would build a bomb if Iran does and can afford to do so. And if the ruling class in SA ever falls they will be replaced by fanatics of an extremity that would make Iran blush.)