Revisionist history is alive and well in your mind my friend. The guy that wrote that piece, Ryan Masaaki Yokota is slightly to the left of your friend FoTL, and his viewpoint reflects that.
The Japanese sacrificed Okinawa? Gave it up because the population wasn't Japanese?
Wrong, and Wrong again.
The Battle for Okinawa was THE toughest battle fought in the Pacific, don’t believe me, ask a veteran of that battle, here’s a little something from Wiki that will give you a rough idea of what happened then: Battle of Okinawa - Wikipedia, the free encyclopedia
Okinawa was considered a prefecture of Japan and a part of the main islands, it’s where the Kamikaze’s started to reach their full impact (no pun intended). This was a precursor to the invasion of the homeland, and the Japanese knew it, and fought with all they had to stop the Allies there. They lost much of their Navy there, including the Yamato, their last mega battleship.
We “prevented them from raising a military to prevent any chance of a resurrection.” I can’t speak for that, but I do know that until VERY recently their own Constitution prevented them from allowing them to sent troops out of the country limits. That’s probably why it was called the JAPANESE SELF DEFENCE FORCES….
“It's time for Japan to set off on its own accord, and stop or savagely curtail our over-the-top military spending overseas.”
Spoken like a true isolationist. That would work really well if everybody felt the same way, and stayed within their own borders. Ideology is a fine thing, unfortunately most don’t follow that train of thought. I will however agree that they (the Japanese) should pick up more of their own defense costs, that would help a lot.