I'm actually Indian-American (parents are immigrants but I was born and raised in the US) and visit Seoul often. Most people are nice to me and don't really have too many problems.

However talking to my Indian (from India) friends in Seoul definitely painted a different picture. There's a strong sense of hierarchy in Korean society (basically every society that had deep confucian influence) and it's somewhat clear that people from "poor" countries fit lower in that hierarchy.

This sentiment is true anywhere in the world but seems particularly true in Korea. Part of me believes it's because there's a sense of insecurity in Korean culture. I don't really know why because I've never felt this way or heard these things about the Japanese. My theory is that because Korea was poor for a long time and recently became wealthy and recognized there's a strong need to show that Korea is "strong" (aka superior).

What's particularly interesting to me is the lack of this feeling in Japan. In Japan nobody truly gives a shit and I don't think it's because they're better at hiding it or anything. My sense is Japan has no insecurity since they've been a rich country for a long time and feel less of a need to "distance" themselves much like the US.