This "betrayer" has about as much of a right to comment and be
critical of Singapore, his HOME country, as you do.
You should be looking at the content of the post, not the origin
of the content of the post.
If you think otherwise, I would say the hostility you are
receiving is a hundred percent justified, and I would have every
right to ask you to "fuck off and go back to Taiwan" as well.
Your Honor, I have nothing more to say.
Objection your honor, personal attack.