The rise of "nationalism and mutual hostility between human groups" is mostly due to the establishment / capitalists / "national security services" of USA.
You make it appear as though it is from all sides, but it is not, it is the old odious "Bzhezinsky doctrine".
It is about gradually, but constantly, creating the image of an "evil adversary".. Venome drop after venome drop..
China is not doing that as far as I know. Neither Russia did it before the war, though you were claiming the contrary (I know, since I live in the west and could compare news from both sides, being a native Russian speaker).
You make it appear as though it is from all sides, but it is not, it is the old odious "Bzhezinsky doctrine".