Responses
At the end of the day... It matters on perspective of the reader and how they are able to interpret the story. I for one interpreted as terrorists who happen to have Arabic names.
You assumed it's racist simply because they have Arabic names and made a conclusion that the author is implying that "All Arabic people are part a religious terrorist organization"

I'm not saying it's right that the author used Arabic names but I'm pretty sure that ppl would be complaining if the author had named them Sangwoo or something cuz it doesn't fit .