Culture and also war. I've mentioned a few times here about my aunt (whom we lived with, let's see, when I was in first and second grade, after Bikini, which my father was key in, but it was also when her husband had died and she was miserable), and later for three months when I was in 4th grade (father directing commercials), and then as a teen for about three years, after my parents lives imploded. She hated Japs, since there was great fear going on, on the coast of California back after Pearl Harbor, and she kept that hate going, later not liking my friends.
They weren't all japanese but a bunch were (my world widened at university) and later my best boss, born in the LA Valley, and then a best mentor, this one born in Japan, were, both of those, closer friends than work people, years now.
If you wonder, Tak (Cicerone) and I have talked about all this at length.
Plus she accused me of smoking maria-juana, which was, at the time though not for very long, false by a long shot.
I'm, y'know, sort of her opposite.