You have no idea how North korea educate children
I've watched a TV grogram in Japan where they obtained Math textbooks for 8 year old children published in North Korea.
Whoa. There are some troops. Who are they?
It says, "Rangers defeated Jap bastards"
Yes, yes. it says "Jap bastards".
There you can find other espressions, "savage officer bastard", also referring to japan.
Now you know how North Korea educate children to hate Japan. Come on! it's math, not history textbook! It's now easy to imagine how they hate America as well.