I don't know about that. I'm Chinese, not Korean, but my anyone in my family who lived through World War II and the generation following them both have a deeply ingrained dislike of the Japanese. Could be that this particular community of Koreans retains that dislike more strongly than the general population. At least that seems like the most plausible explanation so far.not today...
I'm korean and i have nothing against japanese whatsoever. In fact, I really like their culture and sushi is actually my favorite food lol
a friend of mine has a japanese bf (she's korean)
and both countries have some sort of friendly competition going on (samsung vs sony, korean soccer team vs japan soccer team, animation, movies, etc etc)