I don't know any atm which unfortunate because our political history is super interesting as we've gone through so much in the last 60 years. I'm sure there are some good articles around.
- Because of North Korea, most of our early political history was dominated by anti-communist ideology and strong nationalism.
- Also anti-japanese sentiment is one of the best way to gain politicial good will, so both the right wing and left wing accuse each other of being pro-japanese. There is even a dictionary that supposedly tracks of all the "pro-japanese" families/ people.
- You can see these two main sentiments in play whenever Koreans talk about Park Chung-hee, probably the most controversial dictator in Korea. He is idolised by right wingers as the person who lead the economic development; and demonised by left wingers as a ruthless dictator and as a pro-japanese.
This two themes have been the main themes of political conflict in Korea before 2000 (and they still are). But for younger generation, the main conficts now are inequality (house prices, labour rights, corruption) and gender (abysmal birthrate, marriage rate, just lots of hate in all internet forums).