The author implies that the Otto story was simply a lever for Trump to start a war with NK. And that when moods change, the Otto story is no longer "useful" to Trump and so is forgotten. This is more an indictment of the 24 hours news cycle I think.
He also spends a great deal of time defending the NK hospital procedures and "likely" incarceration facilities.
I mean, personally I'm repulsed by NK. I'm repulsed that Trump treated their leader with dignity. I'm repulsed that this story implies that the north koreans didn't get a fair shake in the press.