@Hald I see you don't know much about history. The Japanese back in ww2 used to do horrible stuff to south koreans, most notably using their women as tools for physical pleasure (r*pe, forced prostitution, etc) to their military men. Not just s.koreans actually but in other countries they "visited". If i recall correctly, they also used korean men as additional troops. So its really a deeply rooted hate, particularly from the older generation