I have nothing against Chinese people, what I do have an issue with is the brazen attitude of the Chinese Government. For obvious reasons.
I agree. Japan and China have cultural similarities. However, cultural similarities does not predict national identity and loyalty. Let me take for example the nations of historic Anglo-Saxon linkages. The United Kingdom, Canada, The United States, Australia, South Africa, New Zealand et al. These nations all speak English, had one time in their history a distinct British cultural factor, and were all, at one time, part of the British Empire, and are majority-wise of the Protestant Christian faith. Like the mother country-- Great Britain. However, since independence and through time, these nations developed their own unique identities, own geopolicies, and their own concept of manifest destinies.
Japan , tho never was part of China, was always uniquely Japanese. We had , of course, borrowed from Chinese unique traits that we recognize: Confucian culture, Kanji (Hanzi) characters, however, we have our own uniquely Yamato attributes. Japan is like a stratified rock; there are many , many layers to the identity that is Japanese.