China suffered greatly. Why do Koreans always like to steal culture?

It is Japan that really steals culture. Many front-line experts have been calling on the international community for more than ten years about what Japan has tampered with and claimed to be Japan's traditional China, but they have not been taken seriously. However, on the Internet, there is a lot of hype about the nonexistent Korean stealing culture, and many of them are even just online rumors or distortions of events. There must be black hands behind this, and these black hands are most likely Japanese.