I don't think the US has forced an unconditional surrender since Japan. We have had lots of conflicts, but after the headiness of the bombing and invasion, it ceases to seem like the great idea we thought it was, and we withdraw, leaving the country to itself. As dedicated as the Japanese were to their divine emperor, we forced a culture change, but only after threatening total annihilation and only with the help of the emperor himself. I doubt Iran will be that easy. And in Japan it was not easy to begin with.As I already wrote, the "Iron Dome" in Israel seems not working properly anymore.
In Germany now somebody said "you can't bomb a dictatorship as the Iran into a democracy".
This is wrong. It was possible in WW2 with Germany and Japan.
Use proper weapons, that's all.