Responses
Also, there's unfortunately a great deal of xenophobia and racism. If the country is beefing with annoying, it genuinely can lead to extreme acts of bullying.
Look into Little Psy for another example:
[Newsmaker] ‘Little Psy’ falls victim to racist attack - The Korea Herald https://share.google/rYJFQRwfG0BTLEtBz

Folks, I saw some comments arguing that them having green eyes wouldn't matter and that the author chose a silly issue.
However, as amazingly advanced as South Korea is, there is a large part of the populous who want South Korea to stay ethnically 'pure'.
Regarding the kindergarten bullying: if something is new or 'different', then generally children do often speak without thinking. Though it rarely lessens the inging words of bullies.That can be fixed.
However, the reactions of the adult custoners? I would consider it mild lol. It can leave individuals being fetishizes i.e. Vernon Seventeen. When he first debuted, they CONSTANTLY described him as a South Korean (young) Leonardo Di Caprio.
....Friends he didn't look one bit like Di Caprio They always had him with blonde hair and Di Caprio's 90s hair cut.