As a Chinese speaker I agree that the historic problems are indeed heavily weaponized in the patriotic propaganda, and I don't care about these at all personall

As a Chinese speaker I agree that the historic problems are indeed heavily weaponized in the patriotic propaganda, and I don't care about these at all personally. However, there are people that do care much more about these, in particular in the older generation from my personal experience. Probably the propaganda was more effective before China's opening up. In addition, Japan also have some conflicts from historical reasons with South Korean, which is an ally to Japan (and to the US).