My grandfather had fought in WWII in the Pacific, and had some nasty memories from that time. My mom said he was upset and a bit hurt that she would buy a Japanese machine.
This was also part of the reason Mitsubishi didn’t sell cars in the US under their own name, only under Dodge/Plymouth, until the early '80s
American cars could generally hold together a little longer, not necessarily because rustproofing was better, more that it was just thicker steel that took longer to get through. And even that started going away in the '80s.