Absolute nonsense on innumerable levels.
As noted, the ENORMOUS Japanese population in Hawaii was NOT interned(becuase there wasn't enough shipping to move them, and also because it would have caused the economic collapse of Hawaii if they were moved) and there were no acts of sabotage on Hawaii.
And it's awfully hard for saboteurs to destroy an entire aircraft manufacturing facility anyway.
On the other hand, there were in fact Japanese in the US and Japanese-Americans involved in espionage networks, or who otherwise were sympathetic to Japan, and the idea that EVERY person of Japanese descent was COMPLETELY loyal...the current PC line..is wrong.
There's a great deal of mythology regarding the internment from both sides, and a lot of surprising facts.
You could leave the camps at any time if you went to college, joined the military, or found a job outside of California, Oregon, and Washington.
The internments of US citizens without specific charges against them was unjustified and wrong any way you look at it. Intensive investigation of the Japanese community would have been fine.
Especially if the sabateur is in a relocation center 200 miles (or more) away from the facility...