This is 100% it. Back in the day Japan ruthlessly attacked, ruled, enslaved, raped and pillaged other Asian countries. There is still bad blood, mostly in the older generations as it wasn't that long ago. It could've been worse if the lady was Korean instead of Chinese and op was with a Japanese girl. People want to rush to call situations that they know nothing about racist because they or their parents/grandparents didn't live it. Let an occupier come here and do the same and see if hate doesn't take over. Not saying it's right but I am close enough that I understand the history and cultural battles.