I know you both know this but there may be those that do not.
The policies of No Surrender, Fight to the Last Man, and accompanying civilians committing suicide had been going on long before Okinawa. For the prior year, or better, virtually every island we fought on had that tenacity and bloody end as we fought our way west. It wasn’t just an opinion that they would kill their own population in fighting to the last man, it was an acknowledged certainty.
Remember the Japanese that surrendered in the 60’s, 70’s, and even one until the 80’s?
https://en.wikipedia.org/wiki/Japanese_holdout