R171, “Jap” was a WWII slur used in all kinds of circumstances, including official government propaganda. A lot of people from that era used it because it was used everywhere during the war, and not considered offensive in the same way most racial slurs are. It was considered a slur against an enemy country and its people, like Germans were called “Jerry.”
My grandfather was a Japanese POW at Wake Island. They were starved, tortured and beaten, some were murdered, and although he was generally a civil person, he didn’t care for the Japanese government for the rest of his life. And I’m not sure that included actual Japanese individual people, because he had a business and was nice to everybody. But he thought the government was awful and the culture taught the soldiers to be indifferent to the suffering of others, and he wasn’t wrong. Read about the Rape of Nanking sometime. They were racial supremacists, which led them to believe treating other people like animals was fine, because they were animals, in their minds. Anybody who was a POW of the Japanese around the world came away hating them because they were very cruel to their prisoners, including civilians. I’m sure your family member had PTSD, my grandfather was still having nightmares in his nineties. He came back weighing less than 100 pounds and severely traumatized.
Personally, I think if you see your friends beaten, starved and murdered, you get a free pass on hating the people that did it on behalf of their official government. Plus the Japanese attacked the U.S. That’s not the same as not liking somebody because of their skin color, it’s action based. Some people at the time thought the Japanese were even more brutal to civilians than the Germans, and that’s saying something. They were less disciplined, and they performed a lot of mass rapes and murders of women and sexually mutilated their dead bodies. A lot of it was politically and racially motivated, it wasn’t individuals doing it in their own behalf. And the Japanese government has never apologized to the government sanctioned sex slaves who were raped dozens of times a day, including teenagers. There’s a whole generation of Americans who read the newspapers as this all unfolded. To that generation, the Japanese were just bad news. A lot of them never moved past it.
That’s not really “racial bias” as most people understand it. I bet the German women who got raped en masse by Russians didn’t like Russians for the rest of their lives either.
The Japanese did themselves a lot of damage, because after the war, when people were able to get away and tell their stories, a lot of bad things came to light. Their actions are a big part of why the American government made them restructure after the war.