Antogonism toward other countries, in the shape of holier-than-thou feelings regarding war(s) and the way the perpetrators behave is often misplaced, the result of propaganda and short memories.
I'm reading Colin Wilson's "A Criminal History of Mankind and his details on humankind's history of rage and warmongering is pretty awakening.
See some quotes here regarding European (and American & British) influences on why countries became communist, where the opium trade started (the reason the British *wanted* Hong Kong in the first place) etc.
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