I wasn't swapping anything. I was arguing against the claim that Koreans are being oppressed. They're not. In an attempt by the Japanese government to make amends they have been given privileges that other foreigners don't enjoy. Some Japanese see that as unfair, because why would they enjoy special privileges if they have not been subject to unfair treatment as their ancestors were? That's where the irritation comes from.
Koreans in Japan had been oppressed and are being discriminated today, and the special privileges cover both (with a focus on the former, of course). You can easily say that the oppression and discrimination is different but the border is not clear.
Note that I do not fully agree to their claims; it is rather common that legitimate victims try to maximize their compensations and the Japanese government will have to trade off anyway. But I think you are too generous to Japan on this complicated issue, showing only one aspect of the problem.
“After a decade-long battle, the Supreme Court ruled recently that Chung, the daughter of a Japanese woman and a South Korean man, who was born in Japan and has lived all her life here, could not take the test to become a supervisor at a public health center because she was a foreigner."
Another way to frame this would be she has chosen to "live in limbo". She could naturalise and it would not have been a problem.
Japan makes the zainichi concession because it's got no other option. Force the people affected to become Japanese would cause an outcry. Repatriating them to a country they have never lived in would be little better.
The zainichi status holders that I have met over the years in general identify more strongly with their non Japanese nationality and do not want to naturalise. If that means they cannot become a police officer or a government official it seems fairly reasonable to me.
