"All the facts" probably includes "Several hundred B-29s coming over every night shoveling out several thousands of tons of fire on every city, town, village and hamlet that hadn't already been burnt to the ground".
The surviving Japanese may have said that after the war.
To capture Iwo, we had to kill 99% of the defenders.
To capture Okinawa, we had to kill 90+% of the defenders.
We're really supposed to believe the main islands of Japan would just roll over and surrender?
"It is my opinion that the use of this barbarous weapon at Hiroshima and Nagasaki was of no material assistance in our war against Japan. The Japanese were already defeated and ready to surrender because of the effective sea blockade and the successful bombing with conventional weapons.