Racism in korea

I visited to thailand for traveling at last winter. Fristly, i arrived at Bangkok which is capital city in thailnad. As soon as i arrived, i could feel how much Thailand people like korean and korea culture. When i was walking on the street in bangkok, i could listen korean music especially K-pop, and they really liked that.
so i went to somewhere in bangkok, i'm well treated so much, it was really impressed to me.
When i went to khosamui island which is located in south thailand ,there is no asian exept me and my friend. Almost people is western guys(because there is famous to western people). so contrary in bangkok, i could be treated some what diffrennt. Somtimes they trick to me.
    I think korea is more rich country than thailnad. but western country is more rich than korea. so sometimes people ignor other people who is from poor country compared to thierselves country.
It is similar that sometimes we ignor poor friend instinctively. We know it is bad. But it is instinct problem.
so i think racism also instinct problem.