Yes, I've argued with countless Korean nationalists on Asiafinest forum, /r/Korea, and even KoreanSentry forums. The Koreans nationalist think that a Seoul-led reunified Korea should reclaim Gando/Jiando/Manchuria from China and reclaim Tsushima/Daemado from Japan. That Korea should have nuclear ICBMs, nuclear SLBMs subs, and aircraft carriers with a blue-water navy befitting of a global power. These same Korean nationalists absolutely despise Chinese for some reason, likely intense competition in shipbuilding, semiconductors, TVs, mobile phones, Leagues of Legends, etc.... They also despise Americans but see them as a necessary evil after reunification is secured.
Basically, if you take an average Chinese nationalist, but strip away China's wealth, size, power, divided nation in two, and occupy with foreign military, then you get an average Korean nationalist, the same courage, intense fanaticism/love for country, intellectual reasoning, but with an extreme cognitive dissonance and inferiority complex. The Korean nationalist is the most stubborn with extreme cognitive dissonance I've ever argued against (and yes, Indian nationalists are the most shameless and flamboyant and entertaining).