“...The U.S.A. Is a really young nation, with no concept of animosity that goes back many centuries. ...”
We have enough animosity right here in our country with all of the hostile minority “cultures” clamoring for a piece of Whitey...
“...During a couple of Chinese invasions of Japan, they took kidnapped Japanese women, tortured them, ...”
Yes, and the Japs repaid that with Nanking... they were absolute animals in what they did in that city.
War brings out the repressed psychotic in some folks... and does it in spades.
As for hostile minority groups out to get whitey, appears to only being one racial group, the black community. The others tend to get along with whitey after a couple generations. Despite being here over many generations, many blacks are not trying to get along with whitey (or other races). Just an irritant, will never rise to the level of a coming culture war with Muslims.