If your Chinese friend tells you that China sees Taiwanese and South Koreans as basically race trautors who help white people, is he wrong?

Yes, he's wrong. He's also racist for thinking East Asians are joined at the hip.

TBH I don't know how the typical Chinese citizen views those things. It's not like they're free to express themselves on these issues. 

Taiwanese and South Koreans enjoy the freedoms of democracy which is something that modern day Chinese have never experienced. The Chinese apparently feel the all people of their race who choose to live in a free society are race traitors. That's too bad.

If he uses the term 'trautors', he is wrong, because the word is 'traitors'.

If he claims that China considers them Chinese, he is not wrong.

It means that he’s a racist

he might be wrong