But if you are going to war then it is your responsibility to win in the shortest amount of time possible, with the fewest causalities possible.

Fat Man dropped on Nagasaki was 21KT. Castle Bravo - the largest ever tested by the US was 15,000 KT. So massively larger. About 700 times larger. That being said, if you dropped Castle Bravo on Nagasaki it would probably only affect an area 2-3 times larger than Fat Man did. The size in KT does not directly translate to affected area.

But my biggest beef is that there are many safe and wonderful uses for nuclear power, but we are limited because of the unscientific scare tactics of the anti nuclear crowd.

I have a friend who worked at Three Mile Island when they had their accident. He hated the media stories because they got exactly nothing right. The safety systems there worked exactly as designed, and the "radiation cloud" that was so dramatically portrayed had less radiation in it than the background radiation we all get from the sun. And reactor designs today are far safer than Three Mile Island. There are designs that can run indefinitely without any cooling water at all and still never reach critical mass.