Guadalcanal - 7k casulties.
Tarawa - 1.7k casulties
Saipan - 13.7k casulties
Peleliu - 9.7k casulties
Iwo Jima - 28k casulties
Okinawa - 84k casulties.
One of these things is not like the others.
One of these things just doesn’t belong.
Can you tell me which thing is not like the others.
Before I get to the end of my song?
The point wasn't American casualties - the point was Japanese casualties. For example, of the 25,000 Japanese soldiers on Iwo Jima, how many survived? A couple thousand, maybe? So, based on that shining example (and similar percentages at the other places I mentioned) one could have reasonable assumed, beforehand, that they were willing to fight to the bitter end at Okinawa. And, because there were many more Japanese soldiers on Okinawa than Iwo Jima, one could have also reasonably assumed there would therefore be many more American casualties. You see how this works?
The bitter fighting at Okinawa should NOT have been a surprise to American war planners and it certainly did not alter their plans with regard to the nuke. The nuke had taken YEARS to develop, it had been intended with Germany specifically in mind, but circumstances dictated otherwise. So, your statement that "It was never intended at [sic] Germany" is complete, unadulterated b.s.